/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/unroll-cond-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:02:16,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:02:16,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:02:16,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 14:02:16,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 14:02:16,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 14:02:16,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 14:02:16,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 14:02:16,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 14:02:16,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 14:02:16,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 14:02:16,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 14:02:16,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 14:02:16,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 14:02:16,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 14:02:16,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 14:02:16,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 14:02:16,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 14:02:16,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 14:02:16,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 14:02:16,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 14:02:16,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 14:02:16,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 14:02:16,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 14:02:16,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 14:02:16,419 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 14:02:16,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 14:02:16,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 14:02:16,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 14:02:16,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 14:02:16,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 14:02:16,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 14:02:16,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 14:02:16,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 14:02:16,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 14:02:16,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 14:02:16,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 14:02:16,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 14:02:16,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 14:02:16,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 14:02:16,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 14:02:16,429 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 14:02:16,466 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:02:16,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:02:16,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:02:16,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:02:16,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:02:16,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:02:16,470 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:02:16,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:02:16,470 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:02:16,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:02:16,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:02:16,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:02:16,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:02:16,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:02:16,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:02:16,472 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:02:16,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:02:16,472 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:02:16,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:02:16,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:02:16,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:02:16,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:02:16,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:02:16,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:02:16,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:02:16,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:02:16,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:02:16,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:02:16,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:02:16,474 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:02:16,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:02:16,474 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:02:16,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:02:16,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:02:16,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:02:16,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:02:16,767 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:02:16,768 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:02:16,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl [2021-06-05 14:02:16,769 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl' [2021-06-05 14:02:16,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:02:16,812 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:02:16,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:02:16,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:02:16,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:02:16,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:02:16" (1/1) ... [2021-06-05 14:02:16,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:02:16" (1/1) ... [2021-06-05 14:02:16,834 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:02:16,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:02:16,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:02:16,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:02:16,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:02:16" (1/1) ... [2021-06-05 14:02:16,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:02:16" (1/1) ... [2021-06-05 14:02:16,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:02:16" (1/1) ... [2021-06-05 14:02:16,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:02:16" (1/1) ... [2021-06-05 14:02:16,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:02:16" (1/1) ... [2021-06-05 14:02:16,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:02:16" (1/1) ... [2021-06-05 14:02:16,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:02:16" (1/1) ... [2021-06-05 14:02:16,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:02:16,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:02:16,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:02:16,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:02:16,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:02:16" (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 14:02:16,921 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:02:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:02:16,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:02:16,922 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:02:16,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:02:16,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:02:16,922 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:02:16,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:02:16,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:02:16,923 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 14:02:17,230 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:02:17,230 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 14:02:17,231 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 14:02:17,232 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:02:17 BoogieIcfgContainer [2021-06-05 14:02:17,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:02:17,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:02:17,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:02:17,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:02:17,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:02:16" (1/2) ... [2021-06-05 14:02:17,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e46f60f and model type unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:02:17, skipping insertion in model container [2021-06-05 14:02:17,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:02:17" (2/2) ... [2021-06-05 14:02:17,239 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.bpl [2021-06-05 14:02:17,264 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:02:17,264 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:02:17,265 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:02:17,265 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:02:17,321 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 14:02:17,340 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 14:02:17,365 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:02:17,365 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:02:17,365 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:02:17,365 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:02:17,366 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:02:17,366 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:02:17,366 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:02:17,366 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:02:17,372 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-06-05 14:02:17,380 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 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 14:02:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 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 14:02:17,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 14:02:17,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:17,387 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:17,387 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:17,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:17,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1298021065, now seen corresponding path program 1 times [2021-06-05 14:02:17,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:17,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054548798] [2021-06-05 14:02:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:17,555 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 14:02:17,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:17,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054548798] [2021-06-05 14:02:17,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054548798] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:02:17,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:02:17,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:02:17,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665558127] [2021-06-05 14:02:17,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:02:17,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:17,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:02:17,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:02:17,573 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 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) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:17,613 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-06-05 14:02:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:02:17,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 14:02:17,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:17,622 INFO L225 Difference]: With dead ends: 26 [2021-06-05 14:02:17,622 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 14:02:17,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:02:17,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 14:02:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 14:02:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) 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 14:02:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-06-05 14:02:17,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-06-05 14:02:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:17,649 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-06-05 14:02:17,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-06-05 14:02:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 14:02:17,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:17,651 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:17,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:02:17,651 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:17,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1253032747, now seen corresponding path program 2 times [2021-06-05 14:02:17,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:17,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845801853] [2021-06-05 14:02:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:17,705 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 14:02:17,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:17,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845801853] [2021-06-05 14:02:17,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845801853] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:02:17,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:02:17,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:02:17,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114547778] [2021-06-05 14:02:17,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:02:17,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:17,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:02:17,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:02:17,710 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:17,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:17,743 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 14:02:17,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:02:17,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 14:02:17,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:17,744 INFO L225 Difference]: With dead ends: 28 [2021-06-05 14:02:17,744 INFO L226 Difference]: Without dead ends: 23 [2021-06-05 14:02:17,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:02:17,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-06-05 14:02:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-06-05 14:02:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:17,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 14:02:17,749 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 14:02:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:17,749 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 14:02:17,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:17,750 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 14:02:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 14:02:17,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:17,750 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:17,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 14:02:17,751 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:17,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:17,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1876900165, now seen corresponding path program 1 times [2021-06-05 14:02:17,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:17,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957612590] [2021-06-05 14:02:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:18,005 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-06-05 14:02:18,044 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 14:02:18,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:18,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957612590] [2021-06-05 14:02:18,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957612590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:18,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481224295] [2021-06-05 14:02:18,046 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 14:02:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:18,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:02:18,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:18,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:02:18,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:18,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:18,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:18,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 14:02:18,307 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 14:02:18,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481224295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:18,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:18,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 14:02:18,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016779685] [2021-06-05 14:02:18,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:02:18,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:18,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:02:18,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:02:18,320 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14:02:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:18,391 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-06-05 14:02:18,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:02:18,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 11 [2021-06-05 14:02:18,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:18,394 INFO L225 Difference]: With dead ends: 30 [2021-06-05 14:02:18,394 INFO L226 Difference]: Without dead ends: 22 [2021-06-05 14:02:18,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:02:18,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-06-05 14:02:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-06-05 14:02:18,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-05 14:02:18,403 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-05 14:02:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:18,403 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-05 14:02:18,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14:02:18,404 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-05 14:02:18,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 14:02:18,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:18,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:18,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 14:02:18,625 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:18,626 INFO L82 PathProgramCache]: Analyzing trace with hash 132986681, now seen corresponding path program 2 times [2021-06-05 14:02:18,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:18,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429302956] [2021-06-05 14:02:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:18,783 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 14:02:18,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:18,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429302956] [2021-06-05 14:02:18,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429302956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:18,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55379105] [2021-06-05 14:02:18,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:18,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:18,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:18,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:02:18,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:18,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:18,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-06-05 14:02:18,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:18,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:18,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-05 14:02:18,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:18,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:02:18,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:19,057 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-06-05 14:02:19,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:19,059 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-06-05 14:02:19,116 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 14:02:19,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55379105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:19,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:19,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 14:02:19,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410213999] [2021-06-05 14:02:19,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:02:19,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:19,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:02:19,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:02:19,118 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14:02:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:19,198 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-06-05 14:02:19,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:02:19,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 11 [2021-06-05 14:02:19,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:19,199 INFO L225 Difference]: With dead ends: 35 [2021-06-05 14:02:19,200 INFO L226 Difference]: Without dead ends: 30 [2021-06-05 14:02:19,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:02:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-06-05 14:02:19,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-06-05 14:02:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:19,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-05 14:02:19,203 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-05 14:02:19,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:19,203 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-05 14:02:19,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14:02:19,204 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-05 14:02:19,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 14:02:19,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:19,204 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:19,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:19,428 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:19,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:19,429 INFO L82 PathProgramCache]: Analyzing trace with hash -788714619, now seen corresponding path program 3 times [2021-06-05 14:02:19,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:19,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391823482] [2021-06-05 14:02:19,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:19,484 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 14:02:19,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:19,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391823482] [2021-06-05 14:02:19,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391823482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:19,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269406389] [2021-06-05 14:02:19,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:19,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:02:19,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:19,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:02:19,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:19,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:19,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-06-05 14:02:19,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:19,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:19,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-05 14:02:19,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:19,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:02:19,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:19,715 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-06-05 14:02:19,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:19,720 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-06-05 14:02:19,756 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 14:02:19,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269406389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:19,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:19,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 14:02:19,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033609121] [2021-06-05 14:02:19,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:02:19,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:19,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:02:19,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:02:19,758 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14:02:19,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:19,880 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-06-05 14:02:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:02:19,881 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 11 [2021-06-05 14:02:19,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:19,881 INFO L225 Difference]: With dead ends: 51 [2021-06-05 14:02:19,882 INFO L226 Difference]: Without dead ends: 41 [2021-06-05 14:02:19,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:02:19,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-05 14:02:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-06-05 14:02:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-05 14:02:19,886 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-06-05 14:02:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:19,886 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-05 14:02:19,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 14:02:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-05 14:02:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 14:02:19,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:19,887 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:20,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 14:02:20,109 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:20,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:20,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1870228548, now seen corresponding path program 1 times [2021-06-05 14:02:20,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:20,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851814162] [2021-06-05 14:02:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:20,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:20,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851814162] [2021-06-05 14:02:20,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851814162] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:02:20,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:02:20,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:02:20,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710993030] [2021-06-05 14:02:20,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:02:20,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:20,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:02:20,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:02:20,145 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 14:02:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:20,161 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-06-05 14:02:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:02:20,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 14:02:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:20,163 INFO L225 Difference]: With dead ends: 29 [2021-06-05 14:02:20,163 INFO L226 Difference]: Without dead ends: 29 [2021-06-05 14:02:20,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:02:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-06-05 14:02:20,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-06-05 14:02:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:20,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-06-05 14:02:20,171 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-06-05 14:02:20,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:20,171 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-06-05 14:02:20,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 14:02:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-06-05 14:02:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:02:20,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:20,172 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:20,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 14:02:20,172 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:20,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1515210487, now seen corresponding path program 4 times [2021-06-05 14:02:20,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:20,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004288287] [2021-06-05 14:02:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:20,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:20,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004288287] [2021-06-05 14:02:20,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004288287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:20,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562081107] [2021-06-05 14:02:20,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:20,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:20,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:20,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:02:20,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:20,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:20,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 14:02:20,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:20,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:20,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:20,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 14:02:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:20,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562081107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:20,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:20,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 14:02:20,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182048932] [2021-06-05 14:02:20,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:02:20,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:02:20,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:02:20,498 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 14:02:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:20,575 INFO L93 Difference]: Finished difference Result 37 states and 65 transitions. [2021-06-05 14:02:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:02:20,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 12 [2021-06-05 14:02:20,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:20,575 INFO L225 Difference]: With dead ends: 37 [2021-06-05 14:02:20,576 INFO L226 Difference]: Without dead ends: 29 [2021-06-05 14:02:20,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:02:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-06-05 14:02:20,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-06-05 14:02:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-06-05 14:02:20,580 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-06-05 14:02:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:20,581 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-06-05 14:02:20,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 14:02:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-06-05 14:02:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:02:20,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:20,581 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:20,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:20,797 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:20,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:20,798 INFO L82 PathProgramCache]: Analyzing trace with hash -228702997, now seen corresponding path program 5 times [2021-06-05 14:02:20,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:20,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654064233] [2021-06-05 14:02:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:20,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:20,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654064233] [2021-06-05 14:02:20,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654064233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:20,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579923342] [2021-06-05 14:02:20,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:20,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:20,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:20,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:02:20,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:21,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:21,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-06-05 14:02:21,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:21,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:21,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 14:02:21,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:21,124 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:02:21,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:21,125 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-06-05 14:02:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:21,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579923342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:21,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:21,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 14:02:21,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908118426] [2021-06-05 14:02:21,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:02:21,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:21,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:02:21,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:02:21,162 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 14:02:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:21,258 INFO L93 Difference]: Finished difference Result 40 states and 76 transitions. [2021-06-05 14:02:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:02:21,259 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 12 [2021-06-05 14:02:21,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:21,259 INFO L225 Difference]: With dead ends: 40 [2021-06-05 14:02:21,259 INFO L226 Difference]: Without dead ends: 35 [2021-06-05 14:02:21,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:02:21,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-06-05 14:02:21,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-06-05 14:02:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:21,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-06-05 14:02:21,262 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-06-05 14:02:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:21,263 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-06-05 14:02:21,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 14:02:21,263 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-06-05 14:02:21,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:02:21,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:21,264 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:21,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 14:02:21,479 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:21,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:21,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1150404297, now seen corresponding path program 6 times [2021-06-05 14:02:21,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:21,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148532324] [2021-06-05 14:02:21,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:21,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:21,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148532324] [2021-06-05 14:02:21,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148532324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:21,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368320319] [2021-06-05 14:02:21,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:21,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:02:21,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:21,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:02:21,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:21,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:21,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-06-05 14:02:21,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:21,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:21,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 14:02:21,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:21,765 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:02:21,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:21,766 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-06-05 14:02:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:21,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368320319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:21,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:21,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 14:02:21,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354552994] [2021-06-05 14:02:21,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:02:21,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:21,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:02:21,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:02:21,796 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 14:02:21,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:21,929 INFO L93 Difference]: Finished difference Result 61 states and 110 transitions. [2021-06-05 14:02:21,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:02:21,930 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 12 [2021-06-05 14:02:21,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:21,930 INFO L225 Difference]: With dead ends: 61 [2021-06-05 14:02:21,930 INFO L226 Difference]: Without dead ends: 51 [2021-06-05 14:02:21,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:02:21,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-05 14:02:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2021-06-05 14:02:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-06-05 14:02:21,935 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-06-05 14:02:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:21,935 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-06-05 14:02:21,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 14:02:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-06-05 14:02:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:02:21,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:21,936 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:22,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:22,141 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:22,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:22,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1508538870, now seen corresponding path program 1 times [2021-06-05 14:02:22,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:22,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6311562] [2021-06-05 14:02:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:22,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6311562] [2021-06-05 14:02:22,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6311562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988638880] [2021-06-05 14:02:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:22,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 14:02:22,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:22,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988638880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:22,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:22,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 14:02:22,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988101148] [2021-06-05 14:02:22,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:02:22,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:22,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:02:22,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:02:22,236 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:22,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:22,266 INFO L93 Difference]: Finished difference Result 59 states and 102 transitions. [2021-06-05 14:02:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:02:22,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:02:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:22,276 INFO L225 Difference]: With dead ends: 59 [2021-06-05 14:02:22,276 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 14:02:22,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:02:22,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 14:02:22,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2021-06-05 14:02:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-06-05 14:02:22,284 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 12 [2021-06-05 14:02:22,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:22,285 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-06-05 14:02:22,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-06-05 14:02:22,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:02:22,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:22,290 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:22,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:22,516 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash -549695156, now seen corresponding path program 2 times [2021-06-05 14:02:22,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:22,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604773614] [2021-06-05 14:02:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:22,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:22,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604773614] [2021-06-05 14:02:22,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604773614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:22,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080105598] [2021-06-05 14:02:22,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:22,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:22,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:22,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 14:02:22,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:22,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080105598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:22,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:22,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 14:02:22,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595364999] [2021-06-05 14:02:22,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:02:22,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:22,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:02:22,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:02:22,593 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:22,627 INFO L93 Difference]: Finished difference Result 43 states and 82 transitions. [2021-06-05 14:02:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:02:22,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:02:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:22,628 INFO L225 Difference]: With dead ends: 43 [2021-06-05 14:02:22,628 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 14:02:22,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:02:22,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 14:02:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2021-06-05 14:02:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-06-05 14:02:22,631 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 12 [2021-06-05 14:02:22,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:22,631 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-06-05 14:02:22,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-06-05 14:02:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:02:22,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:22,632 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:22,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 14:02:22,845 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1107234939, now seen corresponding path program 7 times [2021-06-05 14:02:22,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:22,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661156936] [2021-06-05 14:02:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:22,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:22,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661156936] [2021-06-05 14:02:22,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661156936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:22,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868818144] [2021-06-05 14:02:22,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:22,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:02:22,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:23,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:23,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 14:02:23,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:23,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:23,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:23,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 14:02:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:23,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868818144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:23,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:23,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 14:02:23,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107781088] [2021-06-05 14:02:23,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:02:23,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:23,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:02:23,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:02:23,166 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:02:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:23,249 INFO L93 Difference]: Finished difference Result 44 states and 87 transitions. [2021-06-05 14:02:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:02:23,250 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:02:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:23,250 INFO L225 Difference]: With dead ends: 44 [2021-06-05 14:02:23,251 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 14:02:23,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:02:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 14:02:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-06-05 14:02:23,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:23,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-06-05 14:02:23,253 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-06-05 14:02:23,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:23,254 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-06-05 14:02:23,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:02:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-06-05 14:02:23,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:02:23,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:23,254 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:23,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:23,465 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:23,465 INFO L82 PathProgramCache]: Analyzing trace with hash 522117573, now seen corresponding path program 8 times [2021-06-05 14:02:23,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:23,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248942669] [2021-06-05 14:02:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:23,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:23,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248942669] [2021-06-05 14:02:23,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248942669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:23,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152457666] [2021-06-05 14:02:23,552 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 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 14:02:23,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:23,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:23,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:02:23,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:23,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:23,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 14:02:23,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:23,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:23,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:23,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 14:02:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:23,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152457666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:23,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:23,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 14:02:23,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877147973] [2021-06-05 14:02:23,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:02:23,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:23,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:02:23,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:02:23,742 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:23,848 INFO L93 Difference]: Finished difference Result 55 states and 100 transitions. [2021-06-05 14:02:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:02:23,849 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:02:23,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:23,851 INFO L225 Difference]: With dead ends: 55 [2021-06-05 14:02:23,851 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 14:02:23,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:02:23,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 14:02:23,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-06-05 14:02:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-06-05 14:02:23,856 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-06-05 14:02:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:23,856 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-06-05 14:02:23,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-06-05 14:02:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:02:23,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:23,857 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:24,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:24,081 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:24,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:24,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1113906556, now seen corresponding path program 3 times [2021-06-05 14:02:24,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:24,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869531381] [2021-06-05 14:02:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:24,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:24,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869531381] [2021-06-05 14:02:24,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869531381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:24,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167638663] [2021-06-05 14:02:24,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:24,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:02:24,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:02:24,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:24,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167638663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:24,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:24,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:02:24,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941048135] [2021-06-05 14:02:24,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:02:24,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:24,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:02:24,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:02:24,168 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:24,203 INFO L93 Difference]: Finished difference Result 85 states and 153 transitions. [2021-06-05 14:02:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:02:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 14:02:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:24,204 INFO L225 Difference]: With dead ends: 85 [2021-06-05 14:02:24,204 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 14:02:24,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:02:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 14:02:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 38. [2021-06-05 14:02:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:24,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-06-05 14:02:24,208 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-06-05 14:02:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:24,208 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-06-05 14:02:24,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-06-05 14:02:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:02:24,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:24,208 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:24,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 14:02:24,425 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:24,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:24,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1122826714, now seen corresponding path program 4 times [2021-06-05 14:02:24,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:24,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732737016] [2021-06-05 14:02:24,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:24,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:24,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732737016] [2021-06-05 14:02:24,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732737016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:24,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518865956] [2021-06-05 14:02:24,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:24,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:24,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:24,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:02:24,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:24,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518865956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:24,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:24,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:02:24,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842428655] [2021-06-05 14:02:24,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:02:24,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:24,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:02:24,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:02:24,513 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:24,564 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2021-06-05 14:02:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:02:24,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 14:02:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:24,565 INFO L225 Difference]: With dead ends: 65 [2021-06-05 14:02:24,565 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 14:02:24,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:02:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 14:02:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2021-06-05 14:02:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-06-05 14:02:24,568 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-06-05 14:02:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:24,568 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-06-05 14:02:24,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-06-05 14:02:24,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:02:24,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:24,568 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:24,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:24,792 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:24,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1022462021, now seen corresponding path program 9 times [2021-06-05 14:02:24,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:24,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415414196] [2021-06-05 14:02:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:24,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:24,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415414196] [2021-06-05 14:02:24,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415414196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:24,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248186671] [2021-06-05 14:02:24,838 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 14:02:24,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:02:24,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:24,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:02:24,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:25,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:25,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 14:02:25,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:25,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:25,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:25,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 14:02:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:25,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248186671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:25,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:25,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 14:02:25,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946955523] [2021-06-05 14:02:25,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:02:25,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:25,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:02:25,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:02:25,033 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:25,167 INFO L93 Difference]: Finished difference Result 78 states and 134 transitions. [2021-06-05 14:02:25,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:02:25,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:02:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:25,168 INFO L225 Difference]: With dead ends: 78 [2021-06-05 14:02:25,168 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 14:02:25,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:02:25,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 14:02:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2021-06-05 14:02:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:25,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2021-06-05 14:02:25,171 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 13 [2021-06-05 14:02:25,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:25,171 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2021-06-05 14:02:25,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:25,171 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2021-06-05 14:02:25,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:02:25,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:25,171 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:25,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 14:02:25,372 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:25,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:25,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1742081348, now seen corresponding path program 5 times [2021-06-05 14:02:25,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:25,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917044692] [2021-06-05 14:02:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:25,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:25,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917044692] [2021-06-05 14:02:25,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917044692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:25,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079549985] [2021-06-05 14:02:25,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:25,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:02:25,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:25,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:02:25,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:25,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079549985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:25,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:25,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:02:25,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560549214] [2021-06-05 14:02:25,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:02:25,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:25,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:02:25,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:02:25,475 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 14:02:25,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:25,521 INFO L93 Difference]: Finished difference Result 65 states and 130 transitions. [2021-06-05 14:02:25,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:02:25,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 14:02:25,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:25,522 INFO L225 Difference]: With dead ends: 65 [2021-06-05 14:02:25,522 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 14:02:25,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:02:25,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 14:02:25,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2021-06-05 14:02:25,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:25,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 91 transitions. [2021-06-05 14:02:25,526 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 91 transitions. Word has length 13 [2021-06-05 14:02:25,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:25,526 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 91 transitions. [2021-06-05 14:02:25,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 14:02:25,526 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 91 transitions. [2021-06-05 14:02:25,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:02:25,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:25,526 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:25,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:25,741 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:25,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:25,741 INFO L82 PathProgramCache]: Analyzing trace with hash -798664521, now seen corresponding path program 10 times [2021-06-05 14:02:25,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:25,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575598000] [2021-06-05 14:02:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:25,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:25,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575598000] [2021-06-05 14:02:25,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575598000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:25,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145245512] [2021-06-05 14:02:25,784 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 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 14:02:25,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:25,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:25,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:02:25,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:25,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145245512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:25,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:25,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 14:02:25,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600190804] [2021-06-05 14:02:25,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:02:25,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:25,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:02:25,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:02:25,863 INFO L87 Difference]: Start difference. First operand 43 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:25,914 INFO L93 Difference]: Finished difference Result 84 states and 148 transitions. [2021-06-05 14:02:25,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:02:25,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:02:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:25,915 INFO L225 Difference]: With dead ends: 84 [2021-06-05 14:02:25,915 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 14:02:25,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:02:25,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 14:02:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 43. [2021-06-05 14:02:25,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 93 transitions. [2021-06-05 14:02:25,918 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 93 transitions. Word has length 14 [2021-06-05 14:02:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:25,919 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 93 transitions. [2021-06-05 14:02:25,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 93 transitions. [2021-06-05 14:02:25,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:02:25,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:25,919 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:26,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:26,133 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash 861067660, now seen corresponding path program 6 times [2021-06-05 14:02:26,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:26,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802048089] [2021-06-05 14:02:26,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:26,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:26,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802048089] [2021-06-05 14:02:26,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802048089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:26,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056745709] [2021-06-05 14:02:26,160 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 14:02:26,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:02:26,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:26,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:02:26,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:26,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056745709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:26,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:26,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 14:02:26,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395900833] [2021-06-05 14:02:26,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:02:26,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:26,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:02:26,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:02:26,229 INFO L87 Difference]: Start difference. First operand 43 states and 93 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:26,323 INFO L93 Difference]: Finished difference Result 106 states and 189 transitions. [2021-06-05 14:02:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:02:26,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:02:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:26,325 INFO L225 Difference]: With dead ends: 106 [2021-06-05 14:02:26,325 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:02:26,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:02:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:02:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 49. [2021-06-05 14:02:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2916666666666665) internal successors, (110), 48 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 110 transitions. [2021-06-05 14:02:26,330 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 110 transitions. Word has length 14 [2021-06-05 14:02:26,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:26,330 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 110 transitions. [2021-06-05 14:02:26,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 110 transitions. [2021-06-05 14:02:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:02:26,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:26,331 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:26,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:26,545 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:26,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:26,545 INFO L82 PathProgramCache]: Analyzing trace with hash 830687991, now seen corresponding path program 11 times [2021-06-05 14:02:26,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:26,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202836226] [2021-06-05 14:02:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:26,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:26,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202836226] [2021-06-05 14:02:26,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202836226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:26,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926250583] [2021-06-05 14:02:26,578 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 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 14:02:26,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:02:26,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:26,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:02:26,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:26,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926250583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:26,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:26,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 14:02:26,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66301954] [2021-06-05 14:02:26,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:02:26,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:26,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:02:26,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:02:26,646 INFO L87 Difference]: Start difference. First operand 49 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:26,703 INFO L93 Difference]: Finished difference Result 60 states and 123 transitions. [2021-06-05 14:02:26,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:02:26,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:02:26,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:26,704 INFO L225 Difference]: With dead ends: 60 [2021-06-05 14:02:26,704 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 14:02:26,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:02:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 14:02:26,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-06-05 14:02:26,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 48 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 14:02:26,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 109 transitions. [2021-06-05 14:02:26,707 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 109 transitions. Word has length 14 [2021-06-05 14:02:26,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:26,707 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 109 transitions. [2021-06-05 14:02:26,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 109 transitions. [2021-06-05 14:02:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:02:26,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:26,708 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:26,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 14:02:26,931 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:26,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:26,931 INFO L82 PathProgramCache]: Analyzing trace with hash -805336138, now seen corresponding path program 7 times [2021-06-05 14:02:26,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:26,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048583563] [2021-06-05 14:02:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:26,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:26,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048583563] [2021-06-05 14:02:26,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048583563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:26,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849835242] [2021-06-05 14:02:26,958 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 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 14:02:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:26,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:02:26,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:27,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849835242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:27,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:27,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 14:02:27,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523458855] [2021-06-05 14:02:27,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:02:27,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:27,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:02:27,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:02:27,025 INFO L87 Difference]: Start difference. First operand 49 states and 109 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:27,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:27,072 INFO L93 Difference]: Finished difference Result 94 states and 171 transitions. [2021-06-05 14:02:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:02:27,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:02:27,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:27,075 INFO L225 Difference]: With dead ends: 94 [2021-06-05 14:02:27,075 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:02:27,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:02:27,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:02:27,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 46. [2021-06-05 14:02:27,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 97 transitions. [2021-06-05 14:02:27,078 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 97 transitions. Word has length 14 [2021-06-05 14:02:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:27,078 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 97 transitions. [2021-06-05 14:02:27,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 97 transitions. [2021-06-05 14:02:27,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:02:27,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:27,080 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:27,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 14:02:27,281 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:27,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1972248533, now seen corresponding path program 12 times [2021-06-05 14:02:27,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:27,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390626214] [2021-06-05 14:02:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:27,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:27,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390626214] [2021-06-05 14:02:27,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390626214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:27,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829002519] [2021-06-05 14:02:27,307 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:27,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:02:27,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:27,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:02:27,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:27,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829002519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:27,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:27,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 14:02:27,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684688348] [2021-06-05 14:02:27,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:02:27,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:27,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:02:27,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:02:27,358 INFO L87 Difference]: Start difference. First operand 46 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:27,416 INFO L93 Difference]: Finished difference Result 59 states and 113 transitions. [2021-06-05 14:02:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:02:27,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:02:27,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:27,417 INFO L225 Difference]: With dead ends: 59 [2021-06-05 14:02:27,417 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 14:02:27,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:02:27,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 14:02:27,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-06-05 14:02:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 96 transitions. [2021-06-05 14:02:27,419 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 96 transitions. Word has length 14 [2021-06-05 14:02:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:27,420 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 96 transitions. [2021-06-05 14:02:27,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 96 transitions. [2021-06-05 14:02:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:02:27,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:27,420 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:27,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 14:02:27,637 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:27,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:27,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1431397132, now seen corresponding path program 8 times [2021-06-05 14:02:27,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:27,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613476722] [2021-06-05 14:02:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:27,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:27,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613476722] [2021-06-05 14:02:27,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613476722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:27,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890463583] [2021-06-05 14:02:27,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:27,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:27,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:27,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:02:27,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:27,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890463583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:27,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:27,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 14:02:27,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888043127] [2021-06-05 14:02:27,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:02:27,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:27,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:02:27,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:02:27,738 INFO L87 Difference]: Start difference. First operand 46 states and 96 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:27,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:27,803 INFO L93 Difference]: Finished difference Result 91 states and 166 transitions. [2021-06-05 14:02:27,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:02:27,804 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:02:27,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:27,804 INFO L225 Difference]: With dead ends: 91 [2021-06-05 14:02:27,804 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 14:02:27,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:02:27,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 14:02:27,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 47. [2021-06-05 14:02:27,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 46 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 14:02:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2021-06-05 14:02:27,813 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 14 [2021-06-05 14:02:27,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:27,813 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2021-06-05 14:02:27,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:27,813 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2021-06-05 14:02:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:02:27,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:27,815 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:28,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 14:02:28,038 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:28,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:28,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1331032439, now seen corresponding path program 13 times [2021-06-05 14:02:28,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:28,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440372208] [2021-06-05 14:02:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:28,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:28,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440372208] [2021-06-05 14:02:28,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440372208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:28,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643042858] [2021-06-05 14:02:28,071 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 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 14:02:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:28,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:02:28,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:28,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643042858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:28,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:28,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 14:02:28,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160909558] [2021-06-05 14:02:28,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:02:28,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:28,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:02:28,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:02:28,153 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:28,190 INFO L93 Difference]: Finished difference Result 62 states and 119 transitions. [2021-06-05 14:02:28,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:02:28,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:02:28,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:28,191 INFO L225 Difference]: With dead ends: 62 [2021-06-05 14:02:28,191 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 14:02:28,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:02:28,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 14:02:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-06-05 14:02:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-06-05 14:02:28,193 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-06-05 14:02:28,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:28,194 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-06-05 14:02:28,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-06-05 14:02:28,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:02:28,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:28,194 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:28,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 14:02:28,417 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:28,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:28,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2050651766, now seen corresponding path program 9 times [2021-06-05 14:02:28,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:28,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456621500] [2021-06-05 14:02:28,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:28,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:28,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456621500] [2021-06-05 14:02:28,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456621500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:28,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797876557] [2021-06-05 14:02:28,443 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 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 14:02:28,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:02:28,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:28,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:02:28,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:28,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797876557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:28,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:28,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 14:02:28,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055150482] [2021-06-05 14:02:28,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:02:28,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:28,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:02:28,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:02:28,519 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:28,587 INFO L93 Difference]: Finished difference Result 88 states and 165 transitions. [2021-06-05 14:02:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:02:28,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:02:28,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:28,588 INFO L225 Difference]: With dead ends: 88 [2021-06-05 14:02:28,588 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 14:02:28,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:02:28,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 14:02:28,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2021-06-05 14:02:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-06-05 14:02:28,590 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-06-05 14:02:28,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:28,590 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-06-05 14:02:28,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 14:02:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-06-05 14:02:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:02:28,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:28,591 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:28,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:28,791 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:28,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:28,791 INFO L82 PathProgramCache]: Analyzing trace with hash 653527467, now seen corresponding path program 14 times [2021-06-05 14:02:28,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:28,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132281966] [2021-06-05 14:02:28,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:28,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:28,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132281966] [2021-06-05 14:02:28,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132281966] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:02:28,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:02:28,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:02:28,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722310132] [2021-06-05 14:02:28,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:02:28,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:28,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:02:28,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:02:28,819 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:28,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:28,836 INFO L93 Difference]: Finished difference Result 53 states and 106 transitions. [2021-06-05 14:02:28,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:02:28,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:02:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:28,837 INFO L225 Difference]: With dead ends: 53 [2021-06-05 14:02:28,837 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 14:02:28,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:02:28,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 14:02:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-06-05 14:02:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 95 transitions. [2021-06-05 14:02:28,839 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 95 transitions. Word has length 14 [2021-06-05 14:02:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:28,839 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 95 transitions. [2021-06-05 14:02:28,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 95 transitions. [2021-06-05 14:02:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:02:28,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:28,840 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:28,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-06-05 14:02:28,840 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash -227291060, now seen corresponding path program 10 times [2021-06-05 14:02:28,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:28,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994335808] [2021-06-05 14:02:28,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:28,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:28,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994335808] [2021-06-05 14:02:28,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994335808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:28,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977824771] [2021-06-05 14:02:28,866 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 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 14:02:28,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:28,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:28,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:02:28,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:28,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977824771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:28,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:28,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 14:02:28,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761230346] [2021-06-05 14:02:28,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:02:28,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:28,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:02:28,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:02:28,922 INFO L87 Difference]: Start difference. First operand 45 states and 95 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:28,982 INFO L93 Difference]: Finished difference Result 91 states and 185 transitions. [2021-06-05 14:02:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:02:28,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:02:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:28,983 INFO L225 Difference]: With dead ends: 91 [2021-06-05 14:02:28,983 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 14:02:28,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:02:28,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 14:02:28,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2021-06-05 14:02:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 110 transitions. [2021-06-05 14:02:28,985 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 110 transitions. Word has length 14 [2021-06-05 14:02:28,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:28,986 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 110 transitions. [2021-06-05 14:02:28,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:28,986 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 110 transitions. [2021-06-05 14:02:28,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:28,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:28,986 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:29,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:29,205 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:29,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:29,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1836816026, now seen corresponding path program 11 times [2021-06-05 14:02:29,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:29,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207573737] [2021-06-05 14:02:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:29,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:29,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207573737] [2021-06-05 14:02:29,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207573737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:29,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750751346] [2021-06-05 14:02:29,270 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 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 14:02:29,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:02:29,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:29,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:02:29,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:29,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:29,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:29,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:29,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:29,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:29,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:3 [2021-06-05 14:02:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:29,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750751346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:29,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:29,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:29,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020554727] [2021-06-05 14:02:29,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:29,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:29,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:29,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:29,526 INFO L87 Difference]: Start difference. First operand 51 states and 110 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:29,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:29,643 INFO L93 Difference]: Finished difference Result 66 states and 137 transitions. [2021-06-05 14:02:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:02:29,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:29,644 INFO L225 Difference]: With dead ends: 66 [2021-06-05 14:02:29,644 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 14:02:29,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:02:29,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 14:02:29,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-06-05 14:02:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 52 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 114 transitions. [2021-06-05 14:02:29,646 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 114 transitions. Word has length 15 [2021-06-05 14:02:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:29,646 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 114 transitions. [2021-06-05 14:02:29,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 114 transitions. [2021-06-05 14:02:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:29,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:29,647 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:29,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:29,848 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:29,848 INFO L82 PathProgramCache]: Analyzing trace with hash 170412228, now seen corresponding path program 12 times [2021-06-05 14:02:29,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:29,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131688001] [2021-06-05 14:02:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:29,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:29,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131688001] [2021-06-05 14:02:29,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131688001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:29,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250769056] [2021-06-05 14:02:29,932 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 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 14:02:29,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:02:29,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:29,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:29,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:30,421 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 2061 DAG size of output: 44 [2021-06-05 14:02:30,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:30,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:30,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:30,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:30,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:30,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 14:02:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:30,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250769056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:30,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:30,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:30,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816161120] [2021-06-05 14:02:30,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:30,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:30,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:30,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:30,489 INFO L87 Difference]: Start difference. First operand 53 states and 114 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:30,692 INFO L93 Difference]: Finished difference Result 83 states and 179 transitions. [2021-06-05 14:02:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:02:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:30,693 INFO L225 Difference]: With dead ends: 83 [2021-06-05 14:02:30,693 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 14:02:30,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:02:30,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 14:02:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-06-05 14:02:30,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:30,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-06-05 14:02:30,695 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-06-05 14:02:30,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:30,696 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-06-05 14:02:30,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-06-05 14:02:30,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:30,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:30,696 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:30,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 14:02:30,905 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:30,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:30,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1029286758, now seen corresponding path program 13 times [2021-06-05 14:02:30,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:30,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846559229] [2021-06-05 14:02:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:30,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:30,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846559229] [2021-06-05 14:02:30,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846559229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:30,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976269391] [2021-06-05 14:02:30,978 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 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 14:02:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:31,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:31,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:31,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:31,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:31,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:31,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:31,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:31,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:31,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:31,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:31,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:31,346 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:31,360 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:31,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:31,361 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:31,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976269391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:31,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:31,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:31,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127666509] [2021-06-05 14:02:31,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:31,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:31,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:31,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:31,390 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:31,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:31,585 INFO L93 Difference]: Finished difference Result 102 states and 223 transitions. [2021-06-05 14:02:31,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:02:31,585 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:31,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:31,586 INFO L225 Difference]: With dead ends: 102 [2021-06-05 14:02:31,586 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 14:02:31,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:02:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 14:02:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2021-06-05 14:02:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-06-05 14:02:31,589 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-06-05 14:02:31,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:31,589 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-06-05 14:02:31,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-06-05 14:02:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:31,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:31,590 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:31,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:31,790 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:31,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:31,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1887821798, now seen corresponding path program 14 times [2021-06-05 14:02:31,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:31,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324380945] [2021-06-05 14:02:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:31,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:31,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324380945] [2021-06-05 14:02:31,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324380945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:31,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459697365] [2021-06-05 14:02:31,859 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 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 14:02:31,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:31,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:31,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:31,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:32,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:32,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:32,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:32,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:32,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:32,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 14:02:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:32,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459697365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:32,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:32,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:32,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113809139] [2021-06-05 14:02:32,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:32,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:32,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:32,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:32,052 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:32,271 INFO L93 Difference]: Finished difference Result 93 states and 210 transitions. [2021-06-05 14:02:32,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:02:32,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:32,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:32,272 INFO L225 Difference]: With dead ends: 93 [2021-06-05 14:02:32,272 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 14:02:32,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:02:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 14:02:32,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-06-05 14:02:32,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.515151515151515) internal successors, (166), 66 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2021-06-05 14:02:32,275 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 15 [2021-06-05 14:02:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:32,275 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2021-06-05 14:02:32,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2021-06-05 14:02:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:32,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:32,275 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:32,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 14:02:32,485 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1028947268, now seen corresponding path program 15 times [2021-06-05 14:02:32,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:32,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852034123] [2021-06-05 14:02:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:32,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:32,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852034123] [2021-06-05 14:02:32,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852034123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:32,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800057508] [2021-06-05 14:02:32,549 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 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 14:02:32,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:02:32,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:32,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:32,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:32,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:32,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:32,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:32,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:32,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:32,819 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:32,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:32,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:32,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:32,871 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:32,886 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:32,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:32,886 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:32,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800057508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:32,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:32,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:32,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913689190] [2021-06-05 14:02:32,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:32,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:32,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:32,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:32,910 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:33,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:33,145 INFO L93 Difference]: Finished difference Result 119 states and 261 transitions. [2021-06-05 14:02:33,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:02:33,145 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:33,146 INFO L225 Difference]: With dead ends: 119 [2021-06-05 14:02:33,146 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:02:33,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:02:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2021-06-05 14:02:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 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 14:02:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-06-05 14:02:33,149 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-06-05 14:02:33,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:33,149 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-06-05 14:02:33,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:33,150 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-06-05 14:02:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:33,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:33,150 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:33,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:33,365 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:33,365 INFO L82 PathProgramCache]: Analyzing trace with hash 681666040, now seen corresponding path program 16 times [2021-06-05 14:02:33,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:33,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072798547] [2021-06-05 14:02:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:33,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:33,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072798547] [2021-06-05 14:02:33,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072798547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:33,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047959652] [2021-06-05 14:02:33,430 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 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 14:02:33,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:33,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:33,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:33,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:33,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:33,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:33,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:33,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:33,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:33,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:33,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:33,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:33,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:33,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:33,785 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:33,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:33,786 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:33,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047959652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:33,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:33,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:33,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41232190] [2021-06-05 14:02:33,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:33,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:33,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:33,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:33,829 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:34,069 INFO L93 Difference]: Finished difference Result 98 states and 230 transitions. [2021-06-05 14:02:34,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:02:34,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:34,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:34,070 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:02:34,070 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 14:02:34,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 254.3ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 14:02:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2021-06-05 14:02:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 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 14:02:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-06-05 14:02:34,073 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-06-05 14:02:34,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:34,073 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-06-05 14:02:34,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-06-05 14:02:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:34,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:34,073 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:34,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 14:02:34,285 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:34,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:34,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1268567164, now seen corresponding path program 17 times [2021-06-05 14:02:34,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:34,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230548075] [2021-06-05 14:02:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:34,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:34,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230548075] [2021-06-05 14:02:34,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230548075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:34,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400873427] [2021-06-05 14:02:34,351 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 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 14:02:34,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:02:34,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:34,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:34,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:34,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:34,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:34,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:34,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:34,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:34,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 14:02:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:34,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400873427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:34,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:34,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:34,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155946043] [2021-06-05 14:02:34,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:34,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:34,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:34,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:34,605 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:34,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:34,785 INFO L93 Difference]: Finished difference Result 100 states and 238 transitions. [2021-06-05 14:02:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:02:34,785 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:34,785 INFO L225 Difference]: With dead ends: 100 [2021-06-05 14:02:34,786 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 14:02:34,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:02:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 14:02:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-06-05 14:02:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 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 14:02:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-06-05 14:02:34,788 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-06-05 14:02:34,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:34,788 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-06-05 14:02:34,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-06-05 14:02:34,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:34,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:34,789 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:34,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:34,993 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:34,994 INFO L82 PathProgramCache]: Analyzing trace with hash -409692634, now seen corresponding path program 18 times [2021-06-05 14:02:34,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:34,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967736493] [2021-06-05 14:02:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:35,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:35,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967736493] [2021-06-05 14:02:35,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967736493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:35,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969064182] [2021-06-05 14:02:35,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:02:35,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:02:35,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:35,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:35,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:35,297 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 44 [2021-06-05 14:02:35,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:35,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:35,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:35,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:35,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:35,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:35,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:35,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:35,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:35,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:35,502 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:35,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:35,502 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:35,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969064182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:35,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:35,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:35,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839488093] [2021-06-05 14:02:35,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:35,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:35,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:35,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:35,527 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:35,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:35,745 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2021-06-05 14:02:35,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:02:35,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:35,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:35,746 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:02:35,746 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 14:02:35,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:35,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 14:02:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2021-06-05 14:02:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 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 14:02:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-06-05 14:02:35,749 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-06-05 14:02:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:35,749 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-06-05 14:02:35,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-06-05 14:02:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:35,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:35,750 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:35,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 14:02:35,957 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:35,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:35,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1300920674, now seen corresponding path program 19 times [2021-06-05 14:02:35,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:35,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327179947] [2021-06-05 14:02:35,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:36,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:36,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327179947] [2021-06-05 14:02:36,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327179947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:36,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153775228] [2021-06-05 14:02:36,032 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 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 14:02:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:36,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:36,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:36,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:36,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:36,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:36,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:36,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:36,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:36,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:36,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:36,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:36,310 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:36,325 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:36,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:36,326 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:36,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153775228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:36,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:36,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:36,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475545349] [2021-06-05 14:02:36,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:36,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:36,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:36,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:36,353 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:36,636 INFO L93 Difference]: Finished difference Result 104 states and 252 transitions. [2021-06-05 14:02:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:02:36,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:36,637 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:02:36,637 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 14:02:36,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 14:02:36,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2021-06-05 14:02:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 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 14:02:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-06-05 14:02:36,639 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-06-05 14:02:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:36,640 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-06-05 14:02:36,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-06-05 14:02:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:36,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:36,640 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:36,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 14:02:36,861 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:36,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:36,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1504641626, now seen corresponding path program 20 times [2021-06-05 14:02:36,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:36,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024692289] [2021-06-05 14:02:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:36,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:36,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024692289] [2021-06-05 14:02:36,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024692289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:36,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076634082] [2021-06-05 14:02:36,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:36,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:36,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:36,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:36,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:37,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:37,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:37,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:37,218 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:37,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:37,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:37,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:37,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:37,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:37,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:37,278 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:37,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:37,278 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:37,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076634082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:37,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:37,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:37,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870851106] [2021-06-05 14:02:37,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:37,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:37,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:37,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:37,306 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:37,602 INFO L93 Difference]: Finished difference Result 121 states and 292 transitions. [2021-06-05 14:02:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:02:37,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:37,603 INFO L225 Difference]: With dead ends: 121 [2021-06-05 14:02:37,603 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 14:02:37,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 14:02:37,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2021-06-05 14:02:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 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 14:02:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-06-05 14:02:37,606 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-06-05 14:02:37,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:37,606 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-06-05 14:02:37,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:37,606 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-06-05 14:02:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:37,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:37,607 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:37,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 14:02:37,817 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:37,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:37,817 INFO L82 PathProgramCache]: Analyzing trace with hash 748457306, now seen corresponding path program 21 times [2021-06-05 14:02:37,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:37,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769205292] [2021-06-05 14:02:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:37,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:37,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769205292] [2021-06-05 14:02:37,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769205292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:37,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48649216] [2021-06-05 14:02:37,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:37,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:02:37,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:37,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:37,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:38,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:38,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:38,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:38,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:38,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:38,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 14:02:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:38,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48649216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:38,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:38,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:38,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417759292] [2021-06-05 14:02:38,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:38,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:38,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:38,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:38,069 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:38,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:38,253 INFO L93 Difference]: Finished difference Result 107 states and 266 transitions. [2021-06-05 14:02:38,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:02:38,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:38,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:38,254 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:02:38,254 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 14:02:38,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:02:38,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 14:02:38,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-06-05 14:02:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 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 14:02:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 14:02:38,256 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 14:02:38,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:38,256 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 14:02:38,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 14:02:38,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:38,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:38,257 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:38,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 14:02:38,472 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:38,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:38,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1607331836, now seen corresponding path program 22 times [2021-06-05 14:02:38,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:38,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690820392] [2021-06-05 14:02:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:38,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:38,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690820392] [2021-06-05 14:02:38,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690820392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:38,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956254627] [2021-06-05 14:02:38,535 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 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 14:02:38,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:38,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:38,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:38,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:38,803 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 2072 DAG size of output: 44 [2021-06-05 14:02:38,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:38,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:38,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:38,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:38,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:38,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:38,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:38,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:38,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:38,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:38,983 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:38,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:38,984 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:39,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956254627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:39,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:39,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:39,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928649799] [2021-06-05 14:02:39,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:39,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:39,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:39,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:39,009 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:39,309 INFO L93 Difference]: Finished difference Result 129 states and 314 transitions. [2021-06-05 14:02:39,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:02:39,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:39,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:39,310 INFO L225 Difference]: With dead ends: 129 [2021-06-05 14:02:39,310 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 14:02:39,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:39,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 14:02:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2021-06-05 14:02:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 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 14:02:39,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 14:02:39,313 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 14:02:39,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:39,313 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 14:02:39,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:39,314 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 14:02:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:39,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:39,314 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:39,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:39,515 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:39,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:39,515 INFO L82 PathProgramCache]: Analyzing trace with hash -977022152, now seen corresponding path program 23 times [2021-06-05 14:02:39,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:39,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937298385] [2021-06-05 14:02:39,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:39,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:39,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937298385] [2021-06-05 14:02:39,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937298385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:39,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767208540] [2021-06-05 14:02:39,582 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 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 14:02:39,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:02:39,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:39,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:39,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:40,655 WARN L205 SmtUtils]: Spent 941.00 ms on a formula simplification. DAG size of input: 2608 DAG size of output: 45 [2021-06-05 14:02:40,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:40,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:40,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:40,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:40,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:40,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:40,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:40,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:40,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:40,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:40,852 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:40,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:40,853 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:40,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767208540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:40,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:40,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:40,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442785753] [2021-06-05 14:02:40,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:40,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:40,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:40,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:40,884 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:41,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:41,096 INFO L93 Difference]: Finished difference Result 111 states and 280 transitions. [2021-06-05 14:02:41,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:02:41,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:41,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:41,098 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:02:41,098 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:02:41,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:41,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:02:41,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-06-05 14:02:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 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 14:02:41,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 14:02:41,101 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 14:02:41,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:41,101 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 14:02:41,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:41,101 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 14:02:41,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:41,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:41,102 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:41,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 14:02:41,317 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:41,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:41,317 INFO L82 PathProgramCache]: Analyzing trace with hash 512382844, now seen corresponding path program 24 times [2021-06-05 14:02:41,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:41,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041339813] [2021-06-05 14:02:41,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:41,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:41,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041339813] [2021-06-05 14:02:41,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041339813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:41,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137267979] [2021-06-05 14:02:41,389 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 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 14:02:41,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:02:41,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:41,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:41,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:41,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:41,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:41,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:41,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:41,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:41,647 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:41,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:41,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:41,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:41,686 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:41,699 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:41,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:41,700 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:41,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137267979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:41,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:41,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:41,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815583586] [2021-06-05 14:02:41,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:41,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:41,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:41,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:41,725 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:42,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:42,004 INFO L93 Difference]: Finished difference Result 125 states and 307 transitions. [2021-06-05 14:02:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:02:42,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:42,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:42,005 INFO L225 Difference]: With dead ends: 125 [2021-06-05 14:02:42,005 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 14:02:42,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:02:42,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 14:02:42,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 85. [2021-06-05 14:02:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 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 14:02:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 14:02:42,008 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 14:02:42,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:42,008 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 14:02:42,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:42,009 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 14:02:42,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:42,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:42,009 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:42,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 14:02:42,229 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:42,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:42,229 INFO L82 PathProgramCache]: Analyzing trace with hash -560702536, now seen corresponding path program 25 times [2021-06-05 14:02:42,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:42,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891327596] [2021-06-05 14:02:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:42,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:42,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891327596] [2021-06-05 14:02:42,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891327596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:42,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338443534] [2021-06-05 14:02:42,298 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 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 14:02:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:42,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:42,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:42,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:42,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:42,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:42,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:42,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:42,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:42,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:42,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:42,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:42,655 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:42,669 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:42,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:42,670 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:42,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338443534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:42,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:42,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:42,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352502720] [2021-06-05 14:02:42,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:42,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:42,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:42,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:42,697 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:43,061 INFO L93 Difference]: Finished difference Result 139 states and 341 transitions. [2021-06-05 14:02:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:02:43,063 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:43,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:43,064 INFO L225 Difference]: With dead ends: 139 [2021-06-05 14:02:43,064 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 14:02:43,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 379.1ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:02:43,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 14:02:43,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 85. [2021-06-05 14:02:43,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 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 14:02:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-06-05 14:02:43,066 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-06-05 14:02:43,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:43,066 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-06-05 14:02:43,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:43,066 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-06-05 14:02:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:43,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:43,067 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:43,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 14:02:43,267 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:43,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:43,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1148293564, now seen corresponding path program 26 times [2021-06-05 14:02:43,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:43,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942241881] [2021-06-05 14:02:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:43,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:43,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942241881] [2021-06-05 14:02:43,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942241881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:43,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621339599] [2021-06-05 14:02:43,331 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 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 14:02:43,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:43,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:43,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:43,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:43,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:43,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:43,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:43,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:43,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:43,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 14:02:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:43,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621339599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:43,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:43,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:43,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411039939] [2021-06-05 14:02:43,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:43,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:43,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:43,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:43,574 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:43,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:43,754 INFO L93 Difference]: Finished difference Result 117 states and 300 transitions. [2021-06-05 14:02:43,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:02:43,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:43,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:43,755 INFO L225 Difference]: With dead ends: 117 [2021-06-05 14:02:43,755 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:02:43,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:02:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:02:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2021-06-05 14:02:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 14:02:43,759 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 14:02:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:43,760 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 14:02:43,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 14:02:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:43,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:43,761 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:43,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 14:02:43,977 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:43,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash -289419034, now seen corresponding path program 27 times [2021-06-05 14:02:43,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:43,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346292349] [2021-06-05 14:02:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:44,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:44,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346292349] [2021-06-05 14:02:44,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346292349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:44,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647961878] [2021-06-05 14:02:44,055 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 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 14:02:44,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:02:44,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:44,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:44,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:44,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:44,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:44,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:44,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:44,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:44,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:44,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:44,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:44,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:44,447 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:44,460 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:44,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:44,461 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:44,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647961878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:44,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:44,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:44,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121398703] [2021-06-05 14:02:44,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:44,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:44,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:44,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:44,488 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:44,784 INFO L93 Difference]: Finished difference Result 141 states and 356 transitions. [2021-06-05 14:02:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:02:44,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:44,785 INFO L225 Difference]: With dead ends: 141 [2021-06-05 14:02:44,785 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 14:02:44,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 14:02:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2021-06-05 14:02:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:44,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 14:02:44,788 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 14:02:44,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:44,788 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 14:02:44,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 14:02:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:44,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:44,789 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:44,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:44,993 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:44,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:44,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1421194274, now seen corresponding path program 28 times [2021-06-05 14:02:44,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:44,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194615391] [2021-06-05 14:02:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:45,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:45,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194615391] [2021-06-05 14:02:45,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194615391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:45,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438909132] [2021-06-05 14:02:45,054 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 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 14:02:45,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:45,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:45,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:45,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:45,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:45,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:45,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:45,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:45,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:45,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:45,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:45,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:45,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:45,361 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:45,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:45,362 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:45,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438909132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:45,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:45,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:45,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792991431] [2021-06-05 14:02:45,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:45,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:45,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:45,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:45,386 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:45,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:45,568 INFO L93 Difference]: Finished difference Result 128 states and 330 transitions. [2021-06-05 14:02:45,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:02:45,569 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:45,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:45,569 INFO L225 Difference]: With dead ends: 128 [2021-06-05 14:02:45,569 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 14:02:45,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 14:02:45,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-06-05 14:02:45,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 14:02:45,572 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 14:02:45,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:45,572 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 14:02:45,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 14:02:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:45,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:45,573 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:45,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:45,789 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:45,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1384368026, now seen corresponding path program 29 times [2021-06-05 14:02:45,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:45,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406300350] [2021-06-05 14:02:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:45,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:45,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406300350] [2021-06-05 14:02:45,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406300350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:45,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423698548] [2021-06-05 14:02:45,851 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 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 14:02:45,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:02:45,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:45,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:45,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:46,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:46,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:46,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:46,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:46,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:46,108 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:46,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:46,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:46,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:46,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:46,173 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:46,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:46,174 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:46,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423698548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:46,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:46,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:46,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378593526] [2021-06-05 14:02:46,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:46,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:46,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:46,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:46,200 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:46,477 INFO L93 Difference]: Finished difference Result 142 states and 360 transitions. [2021-06-05 14:02:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:02:46,477 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:46,478 INFO L225 Difference]: With dead ends: 142 [2021-06-05 14:02:46,478 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 14:02:46,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:02:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 14:02:46,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2021-06-05 14:02:46,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 14:02:46,481 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 14:02:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:46,481 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 14:02:46,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 14:02:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:46,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:46,482 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:46,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:46,683 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:46,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:46,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1837513890, now seen corresponding path program 30 times [2021-06-05 14:02:46,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:46,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971760056] [2021-06-05 14:02:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:46,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:46,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971760056] [2021-06-05 14:02:46,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971760056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:46,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139337701] [2021-06-05 14:02:46,756 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 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 14:02:46,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:02:46,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:46,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:46,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:46,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:46,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:47,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:47,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:47,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:47,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:47,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:47,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:47,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:47,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:47,100 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:47,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:47,101 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:47,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139337701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:47,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:47,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:47,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897477698] [2021-06-05 14:02:47,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:47,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:47,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:47,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:47,129 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:47,454 INFO L93 Difference]: Finished difference Result 154 states and 387 transitions. [2021-06-05 14:02:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:02:47,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:47,455 INFO L225 Difference]: With dead ends: 154 [2021-06-05 14:02:47,455 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 14:02:47,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:02:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 14:02:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 94. [2021-06-05 14:02:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-06-05 14:02:47,458 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-06-05 14:02:47,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:47,458 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-06-05 14:02:47,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:47,458 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-06-05 14:02:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:02:47,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:47,459 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:47,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:47,659 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:47,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1363361818, now seen corresponding path program 31 times [2021-06-05 14:02:47,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:47,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872473419] [2021-06-05 14:02:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:47,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:47,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872473419] [2021-06-05 14:02:47,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872473419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:47,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801706456] [2021-06-05 14:02:47,724 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 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 14:02:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:47,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:02:47,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:48,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:48,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:02:48,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:48,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:48,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:48,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:48,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:48,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:48,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:02:48,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:48,131 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:02:48,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:48,132 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-06-05 14:02:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:48,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801706456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:48,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:48,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:02:48,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340931104] [2021-06-05 14:02:48,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:02:48,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:02:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:02:48,162 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:48,593 INFO L93 Difference]: Finished difference Result 159 states and 400 transitions. [2021-06-05 14:02:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:02:48,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:48,595 INFO L225 Difference]: With dead ends: 159 [2021-06-05 14:02:48,595 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 14:02:48,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 470.8ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:02:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 14:02:48,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 96. [2021-06-05 14:02:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.7578947368421054) internal successors, (262), 95 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 262 transitions. [2021-06-05 14:02:48,598 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 262 transitions. Word has length 15 [2021-06-05 14:02:48,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:48,598 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 262 transitions. [2021-06-05 14:02:48,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 14:02:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 262 transitions. [2021-06-05 14:02:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:02:48,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:48,599 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:48,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable693 [2021-06-05 14:02:48,799 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:48,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2020244300, now seen corresponding path program 32 times [2021-06-05 14:02:48,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:48,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116983128] [2021-06-05 14:02:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:48,902 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 14:02:48,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:48,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116983128] [2021-06-05 14:02:48,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116983128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:48,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748101534] [2021-06-05 14:02:48,903 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 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 14:02:48,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:48,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:48,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:02:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:49,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:49,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:02:49,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:49,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:49,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:49,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:02:49,150 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 14:02:49,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748101534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:49,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:49,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:02:49,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419296655] [2021-06-05 14:02:49,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:02:49,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:49,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:02:49,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:02:49,151 INFO L87 Difference]: Start difference. First operand 96 states and 262 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:02:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:49,363 INFO L93 Difference]: Finished difference Result 123 states and 314 transitions. [2021-06-05 14:02:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:02:49,363 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:02:49,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:49,364 INFO L225 Difference]: With dead ends: 123 [2021-06-05 14:02:49,364 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:02:49,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:02:49,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:02:49,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-06-05 14:02:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.7346938775510203) internal successors, (268), 98 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 268 transitions. [2021-06-05 14:02:49,367 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 268 transitions. Word has length 16 [2021-06-05 14:02:49,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:49,367 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 268 transitions. [2021-06-05 14:02:49,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:02:49,367 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 268 transitions. [2021-06-05 14:02:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:02:49,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:49,368 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:49,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:49,581 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:49,581 INFO L82 PathProgramCache]: Analyzing trace with hash 353840502, now seen corresponding path program 33 times [2021-06-05 14:02:49,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:49,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782332899] [2021-06-05 14:02:49,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:49,677 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 14:02:49,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:49,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782332899] [2021-06-05 14:02:49,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782332899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:49,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572712860] [2021-06-05 14:02:49,677 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 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 14:02:49,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:02:49,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:49,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:02:49,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:49,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:49,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:02:49,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:49,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:49,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:49,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:02:49,977 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 14:02:49,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572712860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:49,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:49,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:02:49,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007928856] [2021-06-05 14:02:49,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:02:49,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:49,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:02:49,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:02:49,978 INFO L87 Difference]: Start difference. First operand 99 states and 268 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:02:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:50,251 INFO L93 Difference]: Finished difference Result 118 states and 307 transitions. [2021-06-05 14:02:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:02:50,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:02:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:50,252 INFO L225 Difference]: With dead ends: 118 [2021-06-05 14:02:50,252 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:02:50,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:02:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-06-05 14:02:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-06-05 14:02:50,255 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-06-05 14:02:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:50,255 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-06-05 14:02:50,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:02:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-06-05 14:02:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:02:50,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:50,256 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:50,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable757 [2021-06-05 14:02:50,461 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:50,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:50,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1212715032, now seen corresponding path program 34 times [2021-06-05 14:02:50,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:50,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813644166] [2021-06-05 14:02:50,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:50,557 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 14:02:50,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:50,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813644166] [2021-06-05 14:02:50,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813644166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:50,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487194168] [2021-06-05 14:02:50,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:02:50,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:50,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:50,595 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:02:50,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:50,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:50,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:02:50,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:50,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:50,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:02:51,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:51,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:51,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:02:51,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:51,551 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:02:51,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:51,551 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:02:51,583 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 14:02:51,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487194168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:51,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:51,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:02:51,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562504144] [2021-06-05 14:02:51,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:02:51,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:51,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:02:51,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:02:51,585 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:02:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:51,869 INFO L93 Difference]: Finished difference Result 140 states and 346 transitions. [2021-06-05 14:02:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:02:51,869 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:02:51,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:51,870 INFO L225 Difference]: With dead ends: 140 [2021-06-05 14:02:51,870 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 14:02:51,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:51,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 14:02:51,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2021-06-05 14:02:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-06-05 14:02:51,873 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-06-05 14:02:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:51,873 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-06-05 14:02:51,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:02:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-06-05 14:02:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:02:51,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:51,874 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:52,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:52,075 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:52,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:52,075 INFO L82 PathProgramCache]: Analyzing trace with hash 865094314, now seen corresponding path program 35 times [2021-06-05 14:02:52,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:52,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063009283] [2021-06-05 14:02:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:52,162 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 14:02:52,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:52,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063009283] [2021-06-05 14:02:52,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063009283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:52,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572324208] [2021-06-05 14:02:52,162 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 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 14:02:52,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:02:52,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:52,194 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:02:52,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:52,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:52,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:02:52,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:52,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:52,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:02:52,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:52,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:52,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:02:53,344 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 234 [2021-06-05 14:02:54,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:54,103 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:02:54,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:54,103 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:02:54,128 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 14:02:54,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572324208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:54,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:54,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:02:54,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240338139] [2021-06-05 14:02:54,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:02:54,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:54,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:02:54,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:02:54,130 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 14:02:54,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:54,472 INFO L93 Difference]: Finished difference Result 156 states and 373 transitions. [2021-06-05 14:02:54,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:02:54,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 16 [2021-06-05 14:02:54,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:54,473 INFO L225 Difference]: With dead ends: 156 [2021-06-05 14:02:54,473 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 14:02:54,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 286.3ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 14:02:54,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2021-06-05 14:02:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.7254901960784315) internal successors, (278), 102 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:54,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 278 transitions. [2021-06-05 14:02:54,476 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 278 transitions. Word has length 16 [2021-06-05 14:02:54,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:54,477 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 278 transitions. [2021-06-05 14:02:54,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 14:02:54,477 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 278 transitions. [2021-06-05 14:02:54,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:02:54,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:54,477 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:54,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-06-05 14:02:54,700 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:54,700 INFO L82 PathProgramCache]: Analyzing trace with hash -770929815, now seen corresponding path program 36 times [2021-06-05 14:02:54,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:54,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917165505] [2021-06-05 14:02:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:54,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:54,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917165505] [2021-06-05 14:02:54,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917165505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:54,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085967248] [2021-06-05 14:02:54,730 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 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 14:02:54,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:02:54,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:54,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:02:54,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:54,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085967248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:54,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:54,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:02:54,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116237613] [2021-06-05 14:02:54,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:02:54,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:54,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:02:54,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:02:54,780 INFO L87 Difference]: Start difference. First operand 103 states and 278 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 14:02:54,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:54,818 INFO L93 Difference]: Finished difference Result 216 states and 471 transitions. [2021-06-05 14:02:54,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:02:54,818 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 16 [2021-06-05 14:02:54,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:54,819 INFO L225 Difference]: With dead ends: 216 [2021-06-05 14:02:54,819 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 14:02:54,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:02:54,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 14:02:54,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 109. [2021-06-05 14:02:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.787037037037037) internal successors, (301), 108 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 301 transitions. [2021-06-05 14:02:54,823 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 301 transitions. Word has length 16 [2021-06-05 14:02:54,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:54,823 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 301 transitions. [2021-06-05 14:02:54,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 14:02:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 301 transitions. [2021-06-05 14:02:54,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:02:54,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:54,823 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:55,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-06-05 14:02:55,046 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:55,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:55,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1085138890, now seen corresponding path program 37 times [2021-06-05 14:02:55,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:55,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792119404] [2021-06-05 14:02:55,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:55,216 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 14:02:55,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:55,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792119404] [2021-06-05 14:02:55,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792119404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:55,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894352902] [2021-06-05 14:02:55,216 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 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 14:02:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:55,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:02:55,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:55,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:55,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:02:55,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:55,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:55,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:55,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:02:55,560 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 14:02:55,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894352902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:55,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:55,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:02:55,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727934279] [2021-06-05 14:02:55,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:02:55,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:55,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:02:55,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:02:55,561 INFO L87 Difference]: Start difference. First operand 109 states and 301 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:02:55,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:55,834 INFO L93 Difference]: Finished difference Result 126 states and 330 transitions. [2021-06-05 14:02:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:02:55,834 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:02:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:55,835 INFO L225 Difference]: With dead ends: 126 [2021-06-05 14:02:55,835 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 14:02:55,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 381.9ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 14:02:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2021-06-05 14:02:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-06-05 14:02:55,838 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-06-05 14:02:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:55,838 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-06-05 14:02:55,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:02:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-06-05 14:02:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:02:55,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:55,838 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:56,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-06-05 14:02:56,039 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:56,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:56,039 INFO L82 PathProgramCache]: Analyzing trace with hash -226264360, now seen corresponding path program 38 times [2021-06-05 14:02:56,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:56,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280762637] [2021-06-05 14:02:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:56,178 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 14:02:56,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:56,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280762637] [2021-06-05 14:02:56,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280762637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:56,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758366349] [2021-06-05 14:02:56,179 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 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 14:02:56,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:56,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:56,202 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:02:56,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:56,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:56,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:02:56,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:56,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:56,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:02:56,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:56,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:56,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:02:57,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:57,350 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:02:57,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:57,351 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:02:57,379 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 14:02:57,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758366349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:57,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:57,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:02:57,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019831356] [2021-06-05 14:02:57,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:02:57,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:57,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:02:57,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:02:57,381 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:02:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:57,652 INFO L93 Difference]: Finished difference Result 150 states and 373 transitions. [2021-06-05 14:02:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:02:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:02:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:57,653 INFO L225 Difference]: With dead ends: 150 [2021-06-05 14:02:57,653 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 14:02:57,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 14:02:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2021-06-05 14:02:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-06-05 14:02:57,656 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-06-05 14:02:57,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:57,656 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-06-05 14:02:57,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:02:57,656 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-06-05 14:02:57,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:02:57,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:57,657 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:57,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1281 [2021-06-05 14:02:57,869 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:57,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:57,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1484348948, now seen corresponding path program 39 times [2021-06-05 14:02:57,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:57,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423190683] [2021-06-05 14:02:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:57,959 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 14:02:57,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:57,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423190683] [2021-06-05 14:02:57,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423190683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:57,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135826575] [2021-06-05 14:02:57,959 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 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 14:02:57,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:02:57,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:57,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:02:57,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:58,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:58,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:02:58,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:58,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:58,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:02:58,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:58,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:58,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:02:59,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:02:59,380 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:02:59,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:59,380 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:02:59,404 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 14:02:59,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135826575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:59,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:59,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:02:59,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156202726] [2021-06-05 14:02:59,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:02:59,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:59,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:02:59,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:02:59,405 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:02:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:59,778 INFO L93 Difference]: Finished difference Result 171 states and 410 transitions. [2021-06-05 14:02:59,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:02:59,779 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:02:59,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:59,779 INFO L225 Difference]: With dead ends: 171 [2021-06-05 14:02:59,779 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 14:02:59,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:02:59,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 14:02:59,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 109. [2021-06-05 14:02:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-06-05 14:02:59,782 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-06-05 14:02:59,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:59,782 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-06-05 14:02:59,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:02:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-06-05 14:02:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:02:59,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:59,783 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:00,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-06-05 14:03:00,006 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:00,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1321213352, now seen corresponding path program 40 times [2021-06-05 14:03:00,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:00,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481082838] [2021-06-05 14:03:00,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:00,082 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 14:03:00,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:00,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481082838] [2021-06-05 14:03:00,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481082838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:00,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550309987] [2021-06-05 14:03:00,083 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 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 14:03:00,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:00,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:00,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:00,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:00,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:00,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:00,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:00,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:00,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:00,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:00,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:00,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:01,274 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 279 [2021-06-05 14:03:02,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:02,096 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:02,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:02,097 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:02,122 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 14:03:02,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550309987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:02,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:02,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:02,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326392871] [2021-06-05 14:03:02,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:02,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:02,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:02,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:02,123 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:02,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:02,551 INFO L93 Difference]: Finished difference Result 188 states and 439 transitions. [2021-06-05 14:03:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:03:02,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:02,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:02,552 INFO L225 Difference]: With dead ends: 188 [2021-06-05 14:03:02,552 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 14:03:02,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:03:02,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 14:03:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 111. [2021-06-05 14:03:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7636363636363637) internal successors, (304), 110 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 304 transitions. [2021-06-05 14:03:02,555 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 304 transitions. Word has length 16 [2021-06-05 14:03:02,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:02,555 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 304 transitions. [2021-06-05 14:03:02,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 304 transitions. [2021-06-05 14:03:02,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:02,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:02,556 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:02,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1695 [2021-06-05 14:03:02,769 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:02,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:02,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2082432313, now seen corresponding path program 41 times [2021-06-05 14:03:02,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:02,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838925218] [2021-06-05 14:03:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:02,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:02,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838925218] [2021-06-05 14:03:02,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838925218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:02,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940037406] [2021-06-05 14:03:02,799 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 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 14:03:02,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:03:02,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:02,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:03:02,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:02,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940037406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:02,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:02,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:03:02,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682216721] [2021-06-05 14:03:02,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:03:02,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:02,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:03:02,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:03:02,855 INFO L87 Difference]: Start difference. First operand 111 states and 304 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 14:03:02,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:02,913 INFO L93 Difference]: Finished difference Result 260 states and 558 transitions. [2021-06-05 14:03:02,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:03:02,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 16 [2021-06-05 14:03:02,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:02,914 INFO L225 Difference]: With dead ends: 260 [2021-06-05 14:03:02,914 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 14:03:02,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:03:02,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 14:03:02,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 121. [2021-06-05 14:03:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.825) internal successors, (339), 120 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:02,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 339 transitions. [2021-06-05 14:03:02,918 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 339 transitions. Word has length 16 [2021-06-05 14:03:02,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:02,918 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 339 transitions. [2021-06-05 14:03:02,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 14:03:02,918 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 339 transitions. [2021-06-05 14:03:02,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:02,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:02,918 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:03,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1983 [2021-06-05 14:03:03,141 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:03,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:03,141 INFO L82 PathProgramCache]: Analyzing trace with hash 931885580, now seen corresponding path program 42 times [2021-06-05 14:03:03,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:03,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436063197] [2021-06-05 14:03:03,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:03,293 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 14:03:03,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:03,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436063197] [2021-06-05 14:03:03,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436063197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:03,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903574268] [2021-06-05 14:03:03,294 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 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 14:03:03,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:03:03,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:03,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:03,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:03,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:03,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:03,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:03,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:03,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:03,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:03:03,520 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 14:03:03,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903574268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:03,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:03,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:03,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114014035] [2021-06-05 14:03:03,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:03,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:03,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:03,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:03,521 INFO L87 Difference]: Start difference. First operand 121 states and 339 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:03,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:03,779 INFO L93 Difference]: Finished difference Result 136 states and 365 transitions. [2021-06-05 14:03:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:03:03,779 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:03,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:03,780 INFO L225 Difference]: With dead ends: 136 [2021-06-05 14:03:03,780 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 14:03:03,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 339.2ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 14:03:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2021-06-05 14:03:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-06-05 14:03:03,783 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-06-05 14:03:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:03,783 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-06-05 14:03:03,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-06-05 14:03:03,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:03,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:03,783 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:04,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1984,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:04,001 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:04,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:04,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1790760110, now seen corresponding path program 43 times [2021-06-05 14:03:04,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:04,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812565231] [2021-06-05 14:03:04,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:04,143 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 14:03:04,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:04,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812565231] [2021-06-05 14:03:04,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812565231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:04,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888446300] [2021-06-05 14:03:04,144 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 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 14:03:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:04,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:04,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:04,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:04,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:04,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:04,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:04,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:04,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:04,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:04,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:05,288 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 227 [2021-06-05 14:03:06,306 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 295 [2021-06-05 14:03:06,437 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 295 [2021-06-05 14:03:06,573 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 299 [2021-06-05 14:03:06,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:06,977 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:06,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:06,978 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:07,002 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 14:03:07,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888446300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:07,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:07,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:07,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111147856] [2021-06-05 14:03:07,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:07,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:07,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:07,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:07,003 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:07,310 INFO L93 Difference]: Finished difference Result 163 states and 416 transitions. [2021-06-05 14:03:07,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:03:07,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:07,311 INFO L225 Difference]: With dead ends: 163 [2021-06-05 14:03:07,311 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 14:03:07,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 337.6ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:03:07,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 14:03:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-06-05 14:03:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-06-05 14:03:07,314 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-06-05 14:03:07,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:07,314 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-06-05 14:03:07,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-06-05 14:03:07,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:07,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:07,315 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:07,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2005 [2021-06-05 14:03:07,525 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:07,525 INFO L82 PathProgramCache]: Analyzing trace with hash -793593878, now seen corresponding path program 44 times [2021-06-05 14:03:07,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:07,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212449671] [2021-06-05 14:03:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:07,609 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 14:03:07,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:07,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212449671] [2021-06-05 14:03:07,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212449671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:07,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277293249] [2021-06-05 14:03:07,610 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 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 14:03:07,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:07,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:07,634 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:07,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:07,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:07,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:07,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:07,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:07,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:08,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:08,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:08,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:09,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:09,109 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:09,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:09,110 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:09,137 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 14:03:09,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277293249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:09,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:09,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:09,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553246074] [2021-06-05 14:03:09,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:09,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:09,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:09,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:09,139 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:09,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:09,578 INFO L93 Difference]: Finished difference Result 192 states and 470 transitions. [2021-06-05 14:03:09,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:03:09,578 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:09,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:09,579 INFO L225 Difference]: With dead ends: 192 [2021-06-05 14:03:09,579 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 14:03:09,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:03:09,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 14:03:09,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2021-06-05 14:03:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-06-05 14:03:09,583 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-06-05 14:03:09,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:09,583 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-06-05 14:03:09,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:09,583 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-06-05 14:03:09,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:09,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:09,584 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:09,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2448,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:09,797 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:09,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:09,797 INFO L82 PathProgramCache]: Analyzing trace with hash 695811118, now seen corresponding path program 45 times [2021-06-05 14:03:09,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:09,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046753857] [2021-06-05 14:03:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:09,885 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 14:03:09,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:09,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046753857] [2021-06-05 14:03:09,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046753857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:09,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910943915] [2021-06-05 14:03:09,886 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 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 14:03:09,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:03:09,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:09,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:09,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:10,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:10,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:10,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:10,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:10,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:10,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:10,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:10,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:10,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:10,927 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:10,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:10,928 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:10,952 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 14:03:10,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910943915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:10,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:10,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:10,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720316933] [2021-06-05 14:03:10,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:10,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:10,953 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:11,392 INFO L93 Difference]: Finished difference Result 205 states and 493 transitions. [2021-06-05 14:03:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:03:11,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:11,394 INFO L225 Difference]: With dead ends: 205 [2021-06-05 14:03:11,394 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 14:03:11,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 477.8ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:03:11,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 14:03:11,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 121. [2021-06-05 14:03:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-06-05 14:03:11,397 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-06-05 14:03:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:11,397 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-06-05 14:03:11,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:11,397 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-06-05 14:03:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:11,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:11,398 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:11,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2691 [2021-06-05 14:03:11,609 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:11,609 INFO L82 PathProgramCache]: Analyzing trace with hash -377274262, now seen corresponding path program 46 times [2021-06-05 14:03:11,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:11,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427965091] [2021-06-05 14:03:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:11,678 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 14:03:11,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:11,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427965091] [2021-06-05 14:03:11,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427965091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:11,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48331272] [2021-06-05 14:03:11,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:11,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:11,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:11,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:11,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:11,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:11,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:11,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:12,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:12,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:12,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:12,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:12,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:13,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:13,429 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:13,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:13,430 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:13,455 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 14:03:13,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48331272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:13,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:13,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:13,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306449810] [2021-06-05 14:03:13,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:13,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:13,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:13,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:13,456 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:13,852 INFO L93 Difference]: Finished difference Result 165 states and 407 transitions. [2021-06-05 14:03:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:03:13,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:13,853 INFO L225 Difference]: With dead ends: 165 [2021-06-05 14:03:13,853 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 14:03:13,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 457.5ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:03:13,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 14:03:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 123. [2021-06-05 14:03:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.7868852459016393) internal successors, (340), 122 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 340 transitions. [2021-06-05 14:03:13,856 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 340 transitions. Word has length 16 [2021-06-05 14:03:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:13,856 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 340 transitions. [2021-06-05 14:03:13,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 340 transitions. [2021-06-05 14:03:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:13,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:13,856 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:14,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2866,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:14,057 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:14,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:14,057 INFO L82 PathProgramCache]: Analyzing trace with hash 342345065, now seen corresponding path program 47 times [2021-06-05 14:03:14,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:14,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771668910] [2021-06-05 14:03:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:14,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:14,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771668910] [2021-06-05 14:03:14,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771668910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:14,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778242349] [2021-06-05 14:03:14,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:14,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:03:14,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:14,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:03:14,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:14,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778242349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:14,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:14,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:03:14,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980697459] [2021-06-05 14:03:14,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:03:14,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:14,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:03:14,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:03:14,146 INFO L87 Difference]: Start difference. First operand 123 states and 340 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 14:03:14,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:14,236 INFO L93 Difference]: Finished difference Result 247 states and 556 transitions. [2021-06-05 14:03:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:03:14,236 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 16 [2021-06-05 14:03:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:14,237 INFO L225 Difference]: With dead ends: 247 [2021-06-05 14:03:14,237 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 14:03:14,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:03:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 14:03:14,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 134. [2021-06-05 14:03:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.827067669172932) internal successors, (376), 133 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 376 transitions. [2021-06-05 14:03:14,240 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 376 transitions. Word has length 16 [2021-06-05 14:03:14,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:14,240 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 376 transitions. [2021-06-05 14:03:14,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 14:03:14,240 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 376 transitions. [2021-06-05 14:03:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:14,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:14,241 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:14,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3123,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:14,453 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:14,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:14,453 INFO L82 PathProgramCache]: Analyzing trace with hash -964865290, now seen corresponding path program 48 times [2021-06-05 14:03:14,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:14,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812761837] [2021-06-05 14:03:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:14,613 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 14:03:14,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:14,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812761837] [2021-06-05 14:03:14,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812761837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:14,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343704120] [2021-06-05 14:03:14,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:14,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:03:14,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:14,644 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:14,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:14,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:14,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:14,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:14,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:14,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:14,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:03:14,877 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 14:03:14,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343704120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:14,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:14,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:14,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083216596] [2021-06-05 14:03:14,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:14,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:14,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:14,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:14,878 INFO L87 Difference]: Start difference. First operand 134 states and 376 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:15,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:15,152 INFO L93 Difference]: Finished difference Result 150 states and 406 transitions. [2021-06-05 14:03:15,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:03:15,152 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:15,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:15,153 INFO L225 Difference]: With dead ends: 150 [2021-06-05 14:03:15,153 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 14:03:15,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 362.4ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:15,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 14:03:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2021-06-05 14:03:15,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:15,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 14:03:15,156 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 14:03:15,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:15,156 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 14:03:15,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:15,157 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 14:03:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:15,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:15,157 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:15,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:15,358 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:15,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash -105990760, now seen corresponding path program 49 times [2021-06-05 14:03:15,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:15,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811593086] [2021-06-05 14:03:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:15,497 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 14:03:15,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:15,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811593086] [2021-06-05 14:03:15,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811593086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:15,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706377775] [2021-06-05 14:03:15,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:15,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:15,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:15,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:15,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:15,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:15,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:15,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:15,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:16,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:16,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:16,990 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 224 [2021-06-05 14:03:17,193 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 285 [2021-06-05 14:03:17,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:17,527 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:17,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:17,528 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:17,557 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 14:03:17,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706377775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:17,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:17,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:17,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188538988] [2021-06-05 14:03:17,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:17,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:17,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:17,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:17,558 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:17,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:17,922 INFO L93 Difference]: Finished difference Result 179 states and 464 transitions. [2021-06-05 14:03:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:03:17,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:17,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:17,923 INFO L225 Difference]: With dead ends: 179 [2021-06-05 14:03:17,923 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 14:03:17,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 372.8ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:03:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 14:03:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-06-05 14:03:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 14:03:17,926 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 14:03:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:17,926 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 14:03:17,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 14:03:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:17,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:17,926 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:18,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3143 [2021-06-05 14:03:18,141 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:18,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1604622548, now seen corresponding path program 50 times [2021-06-05 14:03:18,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:18,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781993697] [2021-06-05 14:03:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:18,222 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 14:03:18,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:18,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781993697] [2021-06-05 14:03:18,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781993697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:18,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357917775] [2021-06-05 14:03:18,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:18,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:18,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:18,247 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:18,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:18,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:18,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:18,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:18,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:18,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:18,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:18,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:18,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:19,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:19,465 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:19,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:19,466 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:19,490 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 14:03:19,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357917775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:19,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:19,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:19,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174898100] [2021-06-05 14:03:19,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:19,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:19,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:19,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:19,491 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:19,842 INFO L93 Difference]: Finished difference Result 203 states and 504 transitions. [2021-06-05 14:03:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:03:19,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:19,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:19,843 INFO L225 Difference]: With dead ends: 203 [2021-06-05 14:03:19,843 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 14:03:19,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:03:19,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 14:03:19,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 134. [2021-06-05 14:03:19,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 14:03:19,846 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 14:03:19,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:19,847 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 14:03:19,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:19,847 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 14:03:19,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:19,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:19,847 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:20,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:20,061 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:20,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:20,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1200939752, now seen corresponding path program 51 times [2021-06-05 14:03:20,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:20,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176758194] [2021-06-05 14:03:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:20,141 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 14:03:20,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:20,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176758194] [2021-06-05 14:03:20,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176758194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:20,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079079310] [2021-06-05 14:03:20,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:20,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:03:20,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:20,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:20,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:20,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:20,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:20,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:20,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:20,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:20,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:20,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:20,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:21,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:21,539 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:21,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:21,540 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:21,564 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 14:03:21,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079079310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:21,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:21,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:21,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850676830] [2021-06-05 14:03:21,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:21,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:21,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:21,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:21,565 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:22,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:22,121 INFO L93 Difference]: Finished difference Result 226 states and 546 transitions. [2021-06-05 14:03:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:03:22,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:22,122 INFO L225 Difference]: With dead ends: 226 [2021-06-05 14:03:22,122 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 14:03:22,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 492.8ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:03:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 14:03:22,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 134. [2021-06-05 14:03:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:22,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 14:03:22,125 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 14:03:22,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:22,125 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 14:03:22,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:22,125 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 14:03:22,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:22,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:22,125 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:22,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3690 [2021-06-05 14:03:22,326 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:22,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:22,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2020942164, now seen corresponding path program 52 times [2021-06-05 14:03:22,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:22,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930700800] [2021-06-05 14:03:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:22,397 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 14:03:22,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:22,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930700800] [2021-06-05 14:03:22,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930700800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:22,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550419049] [2021-06-05 14:03:22,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:22,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:22,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:22,420 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:22,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:22,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:22,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:22,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:22,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:22,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:22,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:22,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:22,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:23,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:23,408 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:23,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:23,409 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:23,434 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 14:03:23,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550419049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:23,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:23,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:23,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015736978] [2021-06-05 14:03:23,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:23,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:23,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:23,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:23,435 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:23,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:23,821 INFO L93 Difference]: Finished difference Result 186 states and 456 transitions. [2021-06-05 14:03:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:03:23,821 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:23,822 INFO L225 Difference]: With dead ends: 186 [2021-06-05 14:03:23,822 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 14:03:23,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 468.1ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:03:23,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 14:03:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 134. [2021-06-05 14:03:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-06-05 14:03:23,825 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-06-05 14:03:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:23,825 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-06-05 14:03:23,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-06-05 14:03:23,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:23,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:23,825 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:24,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3935 [2021-06-05 14:03:24,041 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:24,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1179933544, now seen corresponding path program 53 times [2021-06-05 14:03:24,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:24,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088080380] [2021-06-05 14:03:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:24,117 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 14:03:24,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:24,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088080380] [2021-06-05 14:03:24,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088080380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:24,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942737859] [2021-06-05 14:03:24,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:24,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:03:24,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:24,140 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:24,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:24,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:24,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:24,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:24,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:24,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:24,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:24,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:24,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:25,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:25,234 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:25,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:25,234 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:25,259 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 14:03:25,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942737859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:25,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:25,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:25,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121423796] [2021-06-05 14:03:25,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:25,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:25,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:25,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:25,260 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:25,719 INFO L93 Difference]: Finished difference Result 186 states and 464 transitions. [2021-06-05 14:03:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:03:25,719 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:25,719 INFO L225 Difference]: With dead ends: 186 [2021-06-05 14:03:25,720 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 14:03:25,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 567.5ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:03:25,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 14:03:25,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2021-06-05 14:03:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.8) internal successors, (378), 135 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 378 transitions. [2021-06-05 14:03:25,722 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 378 transitions. Word has length 16 [2021-06-05 14:03:25,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:25,722 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 378 transitions. [2021-06-05 14:03:25,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:25,722 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 378 transitions. [2021-06-05 14:03:25,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:25,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:25,723 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:25,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-06-05 14:03:25,925 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:25,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:25,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2060752071, now seen corresponding path program 54 times [2021-06-05 14:03:25,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:25,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186960924] [2021-06-05 14:03:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:25,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:25,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186960924] [2021-06-05 14:03:25,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186960924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:25,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810640285] [2021-06-05 14:03:25,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:26,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:03:26,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:26,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:03:26,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:26,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810640285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:26,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:26,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:03:26,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649817949] [2021-06-05 14:03:26,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:03:26,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:26,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:03:26,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:03:26,038 INFO L87 Difference]: Start difference. First operand 136 states and 378 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 14:03:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:26,145 INFO L93 Difference]: Finished difference Result 245 states and 574 transitions. [2021-06-05 14:03:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:03:26,146 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 16 [2021-06-05 14:03:26,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:26,146 INFO L225 Difference]: With dead ends: 245 [2021-06-05 14:03:26,147 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 14:03:26,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 14:03:26,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 144. [2021-06-05 14:03:26,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:26,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-06-05 14:03:26,149 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-06-05 14:03:26,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:26,149 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-06-05 14:03:26,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 14:03:26,150 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-06-05 14:03:26,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:26,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:26,150 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:26,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4302,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:26,365 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:26,365 INFO L82 PathProgramCache]: Analyzing trace with hash 365399884, now seen corresponding path program 55 times [2021-06-05 14:03:26,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:26,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458045614] [2021-06-05 14:03:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:26,532 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 14:03:26,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:26,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458045614] [2021-06-05 14:03:26,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458045614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:26,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492981911] [2021-06-05 14:03:26,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:26,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:26,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:26,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:26,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:26,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:26,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:26,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:26,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:03:26,796 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 14:03:26,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492981911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:26,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:26,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:26,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748017333] [2021-06-05 14:03:26,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:26,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:26,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:26,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:26,797 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:26,989 INFO L93 Difference]: Finished difference Result 164 states and 445 transitions. [2021-06-05 14:03:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:03:26,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:26,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:26,990 INFO L225 Difference]: With dead ends: 164 [2021-06-05 14:03:26,990 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 14:03:26,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:03:26,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 14:03:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2021-06-05 14:03:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-06-05 14:03:26,993 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-06-05 14:03:26,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:26,993 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-06-05 14:03:26,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:26,993 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-06-05 14:03:26,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:26,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:26,994 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:27,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:27,209 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1224274414, now seen corresponding path program 56 times [2021-06-05 14:03:27,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:27,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494259054] [2021-06-05 14:03:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:27,347 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 14:03:27,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:27,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494259054] [2021-06-05 14:03:27,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494259054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:27,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580956076] [2021-06-05 14:03:27,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:27,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:27,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:27,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:27,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:27,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:27,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:27,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:27,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:27,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:27,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:27,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:27,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:29,015 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 313 [2021-06-05 14:03:29,149 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 325 [2021-06-05 14:03:29,284 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 325 [2021-06-05 14:03:29,439 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 329 [2021-06-05 14:03:29,588 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 327 [2021-06-05 14:03:29,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:29,948 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:29,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:29,948 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:29,972 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 14:03:29,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580956076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:29,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:29,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:29,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375697510] [2021-06-05 14:03:29,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:29,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:29,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:29,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:29,973 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:30,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:30,289 INFO L93 Difference]: Finished difference Result 199 states and 522 transitions. [2021-06-05 14:03:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:03:30,289 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:30,290 INFO L225 Difference]: With dead ends: 199 [2021-06-05 14:03:30,290 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 14:03:30,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 309.0ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:30,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 14:03:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 144. [2021-06-05 14:03:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:30,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-06-05 14:03:30,292 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-06-05 14:03:30,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:30,293 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-06-05 14:03:30,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:30,293 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-06-05 14:03:30,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:30,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:30,293 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:30,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4334,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:30,516 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:30,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:30,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1360079574, now seen corresponding path program 57 times [2021-06-05 14:03:30,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:30,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460733063] [2021-06-05 14:03:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:30,617 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 14:03:30,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:30,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460733063] [2021-06-05 14:03:30,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460733063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:30,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008336668] [2021-06-05 14:03:30,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:30,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:03:30,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:30,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:30,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:30,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:30,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:30,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:30,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:30,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:31,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:31,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:31,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:32,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:32,474 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:32,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:32,475 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:32,499 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 14:03:32,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008336668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:32,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:32,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:32,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656970778] [2021-06-05 14:03:32,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:32,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:32,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:32,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:32,500 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:32,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:32,914 INFO L93 Difference]: Finished difference Result 222 states and 560 transitions. [2021-06-05 14:03:32,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:03:32,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:32,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:32,915 INFO L225 Difference]: With dead ends: 222 [2021-06-05 14:03:32,915 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 14:03:32,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 423.5ms TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:03:32,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 14:03:32,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 145. [2021-06-05 14:03:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-06-05 14:03:32,917 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-06-05 14:03:32,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:32,917 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-06-05 14:03:32,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:32,917 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-06-05 14:03:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:32,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:32,918 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:33,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4694 [2021-06-05 14:03:33,118 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:33,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1298863593, now seen corresponding path program 58 times [2021-06-05 14:03:33,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:33,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357066009] [2021-06-05 14:03:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:33,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:33,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357066009] [2021-06-05 14:03:33,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357066009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:33,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023678124] [2021-06-05 14:03:33,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:33,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:33,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:03:33,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:33,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023678124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:33,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:33,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:03:33,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137766215] [2021-06-05 14:03:33,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:03:33,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:33,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:03:33,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:03:33,206 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:33,243 INFO L93 Difference]: Finished difference Result 273 states and 654 transitions. [2021-06-05 14:03:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:03:33,244 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:03:33,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:33,244 INFO L225 Difference]: With dead ends: 273 [2021-06-05 14:03:33,245 INFO L226 Difference]: Without dead ends: 273 [2021-06-05 14:03:33,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:03:33,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-05 14:03:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 175. [2021-06-05 14:03:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8908045977011496) internal successors, (503), 174 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:33,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 503 transitions. [2021-06-05 14:03:33,247 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 503 transitions. Word has length 16 [2021-06-05 14:03:33,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:33,247 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 503 transitions. [2021-06-05 14:03:33,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 503 transitions. [2021-06-05 14:03:33,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:33,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:33,248 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:33,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5047 [2021-06-05 14:03:33,448 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:33,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:33,449 INFO L82 PathProgramCache]: Analyzing trace with hash 129325422, now seen corresponding path program 59 times [2021-06-05 14:03:33,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:33,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139518994] [2021-06-05 14:03:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:33,530 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 14:03:33,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:33,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139518994] [2021-06-05 14:03:33,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139518994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:33,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435524603] [2021-06-05 14:03:33,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:33,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:03:33,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:33,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:33,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:33,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:33,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:33,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:33,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:33,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:34,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:34,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:34,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:34,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:34,649 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:34,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:34,649 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:34,674 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 14:03:34,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435524603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:34,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:34,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:34,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431354522] [2021-06-05 14:03:34,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:34,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:34,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:34,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:34,675 INFO L87 Difference]: Start difference. First operand 175 states and 503 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:35,158 INFO L93 Difference]: Finished difference Result 273 states and 689 transitions. [2021-06-05 14:03:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:03:35,158 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:35,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:35,159 INFO L225 Difference]: With dead ends: 273 [2021-06-05 14:03:35,159 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 14:03:35,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:03:35,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 14:03:35,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 176. [2021-06-05 14:03:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.874285714285714) internal successors, (503), 175 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:35,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 503 transitions. [2021-06-05 14:03:35,162 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 503 transitions. Word has length 16 [2021-06-05 14:03:35,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:35,162 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 503 transitions. [2021-06-05 14:03:35,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:35,162 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 503 transitions. [2021-06-05 14:03:35,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:35,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:35,163 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:35,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5048,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:35,363 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:35,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:35,364 INFO L82 PathProgramCache]: Analyzing trace with hash -761996209, now seen corresponding path program 60 times [2021-06-05 14:03:35,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:35,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015022258] [2021-06-05 14:03:35,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:35,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:35,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015022258] [2021-06-05 14:03:35,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015022258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:35,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380651332] [2021-06-05 14:03:35,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:35,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:03:35,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:35,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:03:35,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:35,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380651332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:35,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:35,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:03:35,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896628971] [2021-06-05 14:03:35,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:03:35,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:35,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:03:35,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:03:35,448 INFO L87 Difference]: Start difference. First operand 176 states and 503 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:35,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:35,507 INFO L93 Difference]: Finished difference Result 300 states and 694 transitions. [2021-06-05 14:03:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:03:35,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:03:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:35,508 INFO L225 Difference]: With dead ends: 300 [2021-06-05 14:03:35,508 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 14:03:35,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:03:35,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 14:03:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 174. [2021-06-05 14:03:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-06-05 14:03:35,512 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-06-05 14:03:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:35,512 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-06-05 14:03:35,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-06-05 14:03:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:35,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:35,512 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:35,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5248,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:35,725 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:35,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:35,725 INFO L82 PathProgramCache]: Analyzing trace with hash -943759958, now seen corresponding path program 61 times [2021-06-05 14:03:35,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:35,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171961458] [2021-06-05 14:03:35,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:35,797 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 14:03:35,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:35,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171961458] [2021-06-05 14:03:35,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171961458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:35,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329931069] [2021-06-05 14:03:35,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:35,821 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:35,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:36,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:36,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:36,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:36,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:36,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:36,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:36,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:36,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:37,284 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 268 [2021-06-05 14:03:37,484 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 272 [2021-06-05 14:03:37,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:37,844 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:37,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:37,845 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:37,870 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 14:03:37,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329931069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:37,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:37,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:37,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515529228] [2021-06-05 14:03:37,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:37,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:37,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:37,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:37,871 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:38,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:38,338 INFO L93 Difference]: Finished difference Result 242 states and 614 transitions. [2021-06-05 14:03:38,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:03:38,339 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:38,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:38,340 INFO L225 Difference]: With dead ends: 242 [2021-06-05 14:03:38,340 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 14:03:38,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 532.5ms TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:03:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 14:03:38,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 174. [2021-06-05 14:03:38,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:38,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-06-05 14:03:38,344 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-06-05 14:03:38,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:38,344 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-06-05 14:03:38,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:38,344 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-06-05 14:03:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:38,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:38,345 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:38,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5249,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:38,561 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:38,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:38,561 INFO L82 PathProgramCache]: Analyzing trace with hash -224140631, now seen corresponding path program 62 times [2021-06-05 14:03:38,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:38,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176236263] [2021-06-05 14:03:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:38,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:38,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176236263] [2021-06-05 14:03:38,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176236263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:38,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303080765] [2021-06-05 14:03:38,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:38,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:38,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:38,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:03:38,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:38,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303080765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:38,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:38,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:03:38,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886206292] [2021-06-05 14:03:38,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:03:38,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:38,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:03:38,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:03:38,642 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:38,722 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2021-06-05 14:03:38,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:03:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:03:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:38,723 INFO L225 Difference]: With dead ends: 262 [2021-06-05 14:03:38,723 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 14:03:38,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:03:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 14:03:38,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 167. [2021-06-05 14:03:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:38,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-06-05 14:03:38,726 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-06-05 14:03:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:38,726 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-06-05 14:03:38,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:38,726 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-06-05 14:03:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:38,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:38,727 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:38,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5581,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:38,941 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:38,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:38,941 INFO L82 PathProgramCache]: Analyzing trace with hash 150331630, now seen corresponding path program 63 times [2021-06-05 14:03:38,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:38,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143558329] [2021-06-05 14:03:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:39,016 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 14:03:39,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:39,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143558329] [2021-06-05 14:03:39,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143558329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:39,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290961173] [2021-06-05 14:03:39,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:39,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:03:39,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:39,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:39,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:39,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:39,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:39,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:39,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:39,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:39,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:39,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:39,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:41,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:41,086 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:41,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:41,086 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:41,111 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 14:03:41,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290961173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:41,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:41,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:41,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818403062] [2021-06-05 14:03:41,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:41,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:41,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:41,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:41,112 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:41,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:41,654 INFO L93 Difference]: Finished difference Result 233 states and 590 transitions. [2021-06-05 14:03:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:03:41,655 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:41,656 INFO L225 Difference]: With dead ends: 233 [2021-06-05 14:03:41,656 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 14:03:41,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 645.6ms TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:03:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 14:03:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 167. [2021-06-05 14:03:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-06-05 14:03:41,659 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-06-05 14:03:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:41,659 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-06-05 14:03:41,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-06-05 14:03:41,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:41,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:41,660 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:41,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5582,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:41,865 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:41,865 INFO L82 PathProgramCache]: Analyzing trace with hash -730486897, now seen corresponding path program 64 times [2021-06-05 14:03:41,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:41,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256369554] [2021-06-05 14:03:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:41,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:41,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256369554] [2021-06-05 14:03:41,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256369554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:41,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076780688] [2021-06-05 14:03:41,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:41,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:41,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:41,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:03:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:41,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076780688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:41,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:41,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:03:41,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954419105] [2021-06-05 14:03:41,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:03:41,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:41,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:03:41,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:03:41,953 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:42,052 INFO L93 Difference]: Finished difference Result 257 states and 618 transitions. [2021-06-05 14:03:42,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:03:42,052 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:03:42,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:42,053 INFO L225 Difference]: With dead ends: 257 [2021-06-05 14:03:42,053 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 14:03:42,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 14:03:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 167. [2021-06-05 14:03:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-06-05 14:03:42,055 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-06-05 14:03:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:42,056 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-06-05 14:03:42,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:42,056 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-06-05 14:03:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:42,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:42,056 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:42,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5917 [2021-06-05 14:03:42,265 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:42,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:42,265 INFO L82 PathProgramCache]: Analyzing trace with hash -292567510, now seen corresponding path program 65 times [2021-06-05 14:03:42,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:42,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326167916] [2021-06-05 14:03:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:42,336 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 14:03:42,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:42,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326167916] [2021-06-05 14:03:42,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326167916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:42,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628664788] [2021-06-05 14:03:42,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:42,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:03:42,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:42,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:03:42,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:42,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:42,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:03:42,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:42,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:42,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-06-05 14:03:42,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:43,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:43,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-06-05 14:03:43,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:43,910 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-06-05 14:03:43,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:43,911 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-06-05 14:03:43,936 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 14:03:43,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628664788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:43,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:43,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:03:43,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220326175] [2021-06-05 14:03:43,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:03:43,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:43,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:03:43,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:43,937 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:44,493 INFO L93 Difference]: Finished difference Result 220 states and 566 transitions. [2021-06-05 14:03:44,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:03:44,494 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:03:44,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:44,495 INFO L225 Difference]: With dead ends: 220 [2021-06-05 14:03:44,495 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 14:03:44,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 677.2ms TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:03:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 14:03:44,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2021-06-05 14:03:44,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.8392857142857144) internal successors, (477), 168 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 477 transitions. [2021-06-05 14:03:44,497 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 477 transitions. Word has length 16 [2021-06-05 14:03:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:44,497 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 477 transitions. [2021-06-05 14:03:44,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:03:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 477 transitions. [2021-06-05 14:03:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:03:44,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:44,498 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:44,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5918 [2021-06-05 14:03:44,699 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:44,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:44,699 INFO L82 PathProgramCache]: Analyzing trace with hash 752648041, now seen corresponding path program 66 times [2021-06-05 14:03:44,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:44,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098396772] [2021-06-05 14:03:44,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:44,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:44,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098396772] [2021-06-05 14:03:44,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098396772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:44,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475236107] [2021-06-05 14:03:44,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:44,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:03:44,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:44,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:03:44,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:44,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475236107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:44,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:44,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:03:44,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101766126] [2021-06-05 14:03:44,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:03:44,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:44,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:03:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:03:44,800 INFO L87 Difference]: Start difference. First operand 169 states and 477 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:44,908 INFO L93 Difference]: Finished difference Result 283 states and 699 transitions. [2021-06-05 14:03:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:03:44,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:03:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:44,909 INFO L225 Difference]: With dead ends: 283 [2021-06-05 14:03:44,909 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 14:03:44,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:44,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 14:03:44,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 176. [2021-06-05 14:03:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.8457142857142856) internal successors, (498), 175 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 498 transitions. [2021-06-05 14:03:44,913 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 498 transitions. Word has length 16 [2021-06-05 14:03:44,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:44,913 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 498 transitions. [2021-06-05 14:03:44,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:44,913 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 498 transitions. [2021-06-05 14:03:44,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:44,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:44,914 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:45,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6233,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:45,129 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:45,129 INFO L82 PathProgramCache]: Analyzing trace with hash -883413798, now seen corresponding path program 67 times [2021-06-05 14:03:45,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:45,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619401479] [2021-06-05 14:03:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:45,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:45,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619401479] [2021-06-05 14:03:45,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619401479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:45,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140840465] [2021-06-05 14:03:45,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:45,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:45,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:45,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:45,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:03:45,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:45,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:45,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:45,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:03:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:45,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140840465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:45,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:45,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:03:45,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820054412] [2021-06-05 14:03:45,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:03:45,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:45,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:03:45,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:03:45,695 INFO L87 Difference]: Start difference. First operand 176 states and 498 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:45,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:45,945 INFO L93 Difference]: Finished difference Result 212 states and 582 transitions. [2021-06-05 14:03:45,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:03:45,945 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:45,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:45,946 INFO L225 Difference]: With dead ends: 212 [2021-06-05 14:03:45,946 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 14:03:45,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 14:03:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2021-06-05 14:03:45,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8702702702702703) internal successors, (531), 185 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:45,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 531 transitions. [2021-06-05 14:03:45,949 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 531 transitions. Word has length 17 [2021-06-05 14:03:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:45,949 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 531 transitions. [2021-06-05 14:03:45,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 531 transitions. [2021-06-05 14:03:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:45,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:45,949 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:46,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6234 [2021-06-05 14:03:46,153 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:46,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:46,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1745149700, now seen corresponding path program 68 times [2021-06-05 14:03:46,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:46,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329702104] [2021-06-05 14:03:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:46,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:46,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329702104] [2021-06-05 14:03:46,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329702104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:46,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374825645] [2021-06-05 14:03:46,264 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 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 14:03:46,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:46,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:46,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:46,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:46,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:46,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:03:46,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:46,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:46,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:46,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:03:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:46,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374825645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:46,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:46,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:03:46,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55059726] [2021-06-05 14:03:46,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:03:46,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:46,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:03:46,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:03:46,613 INFO L87 Difference]: Start difference. First operand 186 states and 531 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:46,929 INFO L93 Difference]: Finished difference Result 207 states and 575 transitions. [2021-06-05 14:03:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:03:46,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:46,930 INFO L225 Difference]: With dead ends: 207 [2021-06-05 14:03:46,930 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 14:03:46,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 330.8ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 14:03:46,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2021-06-05 14:03:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:46,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-06-05 14:03:46,933 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-06-05 14:03:46,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:46,933 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-06-05 14:03:46,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:46,934 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-06-05 14:03:46,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:46,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:46,934 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:47,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6318,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:47,146 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:47,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:47,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1690943066, now seen corresponding path program 69 times [2021-06-05 14:03:47,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:47,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724649] [2021-06-05 14:03:47,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:47,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:47,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724649] [2021-06-05 14:03:47,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:47,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664435993] [2021-06-05 14:03:47,258 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 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 14:03:47,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:03:47,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:47,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:47,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:47,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:47,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 14:03:48,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:48,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:48,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:03:49,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:49,071 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:03:49,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:49,072 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 14:03:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:49,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664435993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:49,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:49,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:03:49,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115319636] [2021-06-05 14:03:49,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:03:49,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:49,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:03:49,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:03:49,100 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:49,398 INFO L93 Difference]: Finished difference Result 235 states and 628 transitions. [2021-06-05 14:03:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:03:49,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:49,400 INFO L225 Difference]: With dead ends: 235 [2021-06-05 14:03:49,400 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 14:03:49,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 270.7ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:49,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 14:03:49,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 186. [2021-06-05 14:03:49,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8594594594594596) internal successors, (529), 185 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 529 transitions. [2021-06-05 14:03:49,403 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 529 transitions. Word has length 17 [2021-06-05 14:03:49,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:49,403 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 529 transitions. [2021-06-05 14:03:49,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:49,403 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 529 transitions. [2021-06-05 14:03:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:49,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:49,404 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:49,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6354 [2021-06-05 14:03:49,609 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:49,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2038563784, now seen corresponding path program 70 times [2021-06-05 14:03:49,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:49,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590842244] [2021-06-05 14:03:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:49,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:49,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590842244] [2021-06-05 14:03:49,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590842244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:49,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988365007] [2021-06-05 14:03:49,731 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 14:03:49,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:49,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:49,754 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:49,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:49,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 14:03:50,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:50,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:50,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:03:50,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:50,687 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:03:50,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:50,688 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 14:03:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:50,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988365007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:50,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:50,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:03:50,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231461437] [2021-06-05 14:03:50,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:03:50,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:50,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:03:50,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:03:50,715 INFO L87 Difference]: Start difference. First operand 186 states and 529 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:51,126 INFO L93 Difference]: Finished difference Result 263 states and 678 transitions. [2021-06-05 14:03:51,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:03:51,126 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:51,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:51,127 INFO L225 Difference]: With dead ends: 263 [2021-06-05 14:03:51,127 INFO L226 Difference]: Without dead ends: 253 [2021-06-05 14:03:51,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 359.0ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:03:51,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-05 14:03:51,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 187. [2021-06-05 14:03:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-06-05 14:03:51,130 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-06-05 14:03:51,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:51,130 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-06-05 14:03:51,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-06-05 14:03:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:51,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:51,131 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:51,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6658,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:51,345 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:51,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:51,345 INFO L82 PathProgramCache]: Analyzing trace with hash 620379383, now seen corresponding path program 71 times [2021-06-05 14:03:51,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:51,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659109667] [2021-06-05 14:03:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:51,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:51,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659109667] [2021-06-05 14:03:51,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659109667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:51,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271059833] [2021-06-05 14:03:51,377 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 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 14:03:51,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:03:51,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:51,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:03:51,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:51,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271059833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:51,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:51,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:03:51,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971467938] [2021-06-05 14:03:51,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:03:51,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:51,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:03:51,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:03:51,451 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:51,496 INFO L93 Difference]: Finished difference Result 357 states and 825 transitions. [2021-06-05 14:03:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:03:51,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:03:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:51,498 INFO L225 Difference]: With dead ends: 357 [2021-06-05 14:03:51,498 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 14:03:51,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:03:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 14:03:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-06-05 14:03:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-06-05 14:03:51,502 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-06-05 14:03:51,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:51,502 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-06-05 14:03:51,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-06-05 14:03:51,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:51,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:51,503 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:51,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6824 [2021-06-05 14:03:51,717 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:51,717 INFO L82 PathProgramCache]: Analyzing trace with hash -821225785, now seen corresponding path program 72 times [2021-06-05 14:03:51,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:51,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479811087] [2021-06-05 14:03:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:51,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:51,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479811087] [2021-06-05 14:03:51,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479811087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:51,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92075455] [2021-06-05 14:03:51,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:03:51,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:03:51,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:51,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:03:51,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:51,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92075455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:51,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:51,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:03:51,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105509158] [2021-06-05 14:03:51,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:03:51,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:51,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:03:51,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:03:51,816 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:51,881 INFO L93 Difference]: Finished difference Result 374 states and 857 transitions. [2021-06-05 14:03:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:03:51,881 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:03:51,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:51,883 INFO L225 Difference]: With dead ends: 374 [2021-06-05 14:03:51,883 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 14:03:51,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:03:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 14:03:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 189. [2021-06-05 14:03:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:51,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-06-05 14:03:51,887 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-06-05 14:03:51,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:51,887 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-06-05 14:03:51,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:51,887 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-06-05 14:03:51,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:51,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:51,888 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:52,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6825,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:52,113 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:52,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:52,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1971772518, now seen corresponding path program 73 times [2021-06-05 14:03:52,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:52,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683699636] [2021-06-05 14:03:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:52,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:52,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683699636] [2021-06-05 14:03:52,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683699636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:52,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479304593] [2021-06-05 14:03:52,269 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 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 14:03:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:52,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:52,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:52,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:52,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:03:52,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:52,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:52,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:52,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:03:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:52,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479304593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:52,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:52,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:03:52,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190564508] [2021-06-05 14:03:52,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:03:52,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:52,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:03:52,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:03:52,583 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:52,827 INFO L93 Difference]: Finished difference Result 202 states and 560 transitions. [2021-06-05 14:03:52,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:03:52,827 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:52,828 INFO L225 Difference]: With dead ends: 202 [2021-06-05 14:03:52,828 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 14:03:52,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 354.1ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:03:52,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 14:03:52,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2021-06-05 14:03:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-06-05 14:03:52,831 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-06-05 14:03:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:52,831 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-06-05 14:03:52,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-06-05 14:03:52,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:52,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:52,831 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:53,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6826 [2021-06-05 14:03:53,044 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:53,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:53,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1112897988, now seen corresponding path program 74 times [2021-06-05 14:03:53,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:53,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083539149] [2021-06-05 14:03:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:53,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:53,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083539149] [2021-06-05 14:03:53,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083539149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:53,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213871562] [2021-06-05 14:03:53,184 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 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 14:03:53,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:53,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:53,208 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:53,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:53,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:53,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 14:03:53,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:53,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:53,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:03:54,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:54,152 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:03:54,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:54,153 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 14:03:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:54,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213871562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:54,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:54,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:03:54,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872338914] [2021-06-05 14:03:54,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:03:54,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:54,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:03:54,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:03:54,179 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:54,502 INFO L93 Difference]: Finished difference Result 227 states and 606 transitions. [2021-06-05 14:03:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:03:54,502 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:54,503 INFO L225 Difference]: With dead ends: 227 [2021-06-05 14:03:54,503 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 14:03:54,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:03:54,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 14:03:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 189. [2021-06-05 14:03:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-06-05 14:03:54,506 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-06-05 14:03:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:54,506 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-06-05 14:03:54,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-06-05 14:03:54,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:54,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:54,506 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:54,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6868 [2021-06-05 14:03:54,707 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:54,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:54,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1195798685, now seen corresponding path program 75 times [2021-06-05 14:03:54,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:54,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048858764] [2021-06-05 14:03:54,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:54,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:54,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048858764] [2021-06-05 14:03:54,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048858764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:54,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561115969] [2021-06-05 14:03:54,742 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 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 14:03:54,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:03:54,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:54,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:03:54,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:54,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561115969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:54,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:54,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:03:54,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736951762] [2021-06-05 14:03:54,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:03:54,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:54,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:03:54,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:03:54,789 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:54,846 INFO L93 Difference]: Finished difference Result 377 states and 865 transitions. [2021-06-05 14:03:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:03:54,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:03:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:54,848 INFO L225 Difference]: With dead ends: 377 [2021-06-05 14:03:54,848 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 14:03:54,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:03:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 14:03:54,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 197. [2021-06-05 14:03:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-06-05 14:03:54,852 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-06-05 14:03:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:54,852 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-06-05 14:03:54,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-06-05 14:03:54,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:54,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:54,853 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:55,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7043,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:55,069 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:55,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:55,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1733654263, now seen corresponding path program 76 times [2021-06-05 14:03:55,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:55,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433031087] [2021-06-05 14:03:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:55,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:55,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433031087] [2021-06-05 14:03:55,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433031087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:55,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304753572] [2021-06-05 14:03:55,101 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 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 14:03:55,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:55,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:55,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:03:55,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:55,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304753572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:55,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:55,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:03:55,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017199105] [2021-06-05 14:03:55,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:03:55,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:55,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:03:55,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:03:55,154 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:55,243 INFO L93 Difference]: Finished difference Result 413 states and 931 transitions. [2021-06-05 14:03:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:03:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:03:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:55,245 INFO L225 Difference]: With dead ends: 413 [2021-06-05 14:03:55,245 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 14:03:55,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:03:55,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 14:03:55,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 197. [2021-06-05 14:03:55,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.872448979591837) internal successors, (563), 196 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 563 transitions. [2021-06-05 14:03:55,248 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 563 transitions. Word has length 17 [2021-06-05 14:03:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:55,248 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 563 transitions. [2021-06-05 14:03:55,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 563 transitions. [2021-06-05 14:03:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:55,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:55,248 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:55,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7044,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:55,458 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:55,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:55,458 INFO L82 PathProgramCache]: Analyzing trace with hash 426443908, now seen corresponding path program 77 times [2021-06-05 14:03:55,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:55,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792425487] [2021-06-05 14:03:55,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:55,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:55,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792425487] [2021-06-05 14:03:55,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792425487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:55,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729825747] [2021-06-05 14:03:55,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:03:55,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:03:55,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:55,626 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:55,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:55,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:55,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:03:55,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:55,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:55,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:55,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:03:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:55,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729825747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:55,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:55,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:03:55,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067335328] [2021-06-05 14:03:55,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:03:55,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:55,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:03:55,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:03:55,977 INFO L87 Difference]: Start difference. First operand 197 states and 563 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:56,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:56,315 INFO L93 Difference]: Finished difference Result 211 states and 586 transitions. [2021-06-05 14:03:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:03:56,316 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:56,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:56,316 INFO L225 Difference]: With dead ends: 211 [2021-06-05 14:03:56,316 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 14:03:56,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:03:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 14:03:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2021-06-05 14:03:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-06-05 14:03:56,319 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-06-05 14:03:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:56,319 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-06-05 14:03:56,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-06-05 14:03:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:56,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:56,320 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:56,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7045 [2021-06-05 14:03:56,520 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:56,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1285318438, now seen corresponding path program 78 times [2021-06-05 14:03:56,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:56,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440435483] [2021-06-05 14:03:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:56,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:56,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440435483] [2021-06-05 14:03:56,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440435483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:56,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188909069] [2021-06-05 14:03:56,693 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 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 14:03:56,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:03:56,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:56,718 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:56,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:56,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:56,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 14:03:57,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:03:57,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:57,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:03:57,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:57,674 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-06-05 14:03:57,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:57,675 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 14:03:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:57,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188909069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:57,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:57,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:03:57,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113917381] [2021-06-05 14:03:57,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:03:57,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:57,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:03:57,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:03:57,701 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:58,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:58,048 INFO L93 Difference]: Finished difference Result 244 states and 655 transitions. [2021-06-05 14:03:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:03:58,049 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:58,050 INFO L225 Difference]: With dead ends: 244 [2021-06-05 14:03:58,050 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 14:03:58,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:03:58,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 14:03:58,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 197. [2021-06-05 14:03:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-06-05 14:03:58,053 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-06-05 14:03:58,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:58,054 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-06-05 14:03:58,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:58,054 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-06-05 14:03:58,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:58,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:58,054 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:58,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7086 [2021-06-05 14:03:58,269 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:58,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:58,269 INFO L82 PathProgramCache]: Analyzing trace with hash -163096607, now seen corresponding path program 79 times [2021-06-05 14:03:58,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:58,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46763568] [2021-06-05 14:03:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:58,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:58,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46763568] [2021-06-05 14:03:58,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46763568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:58,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980370001] [2021-06-05 14:03:58,303 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 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 14:03:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:58,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:03:58,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:58,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980370001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:58,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:58,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:03:58,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532747733] [2021-06-05 14:03:58,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:03:58,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:58,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:03:58,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:03:58,356 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:58,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:58,444 INFO L93 Difference]: Finished difference Result 427 states and 977 transitions. [2021-06-05 14:03:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:03:58,445 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:03:58,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:58,446 INFO L225 Difference]: With dead ends: 427 [2021-06-05 14:03:58,446 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 14:03:58,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:03:58,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 14:03:58,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 207. [2021-06-05 14:03:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.907766990291262) internal successors, (599), 206 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 599 transitions. [2021-06-05 14:03:58,449 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 599 transitions. Word has length 17 [2021-06-05 14:03:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:58,449 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 599 transitions. [2021-06-05 14:03:58,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:58,450 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 599 transitions. [2021-06-05 14:03:58,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:58,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:58,450 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:58,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7259,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:58,651 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:58,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:58,651 INFO L82 PathProgramCache]: Analyzing trace with hash -669442873, now seen corresponding path program 80 times [2021-06-05 14:03:58,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:58,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269536203] [2021-06-05 14:03:58,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:58,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:58,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269536203] [2021-06-05 14:03:58,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269536203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:58,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286824606] [2021-06-05 14:03:58,691 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 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 14:03:58,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:58,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:58,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:03:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:58,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286824606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:58,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:58,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:03:58,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535379566] [2021-06-05 14:03:58,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:03:58,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:58,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:03:58,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:03:58,755 INFO L87 Difference]: Start difference. First operand 207 states and 599 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:58,872 INFO L93 Difference]: Finished difference Result 378 states and 905 transitions. [2021-06-05 14:03:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:03:58,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:03:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:58,873 INFO L225 Difference]: With dead ends: 378 [2021-06-05 14:03:58,873 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 14:03:58,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:03:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 14:03:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 204. [2021-06-05 14:03:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-06-05 14:03:58,879 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-06-05 14:03:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:58,880 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-06-05 14:03:58,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-06-05 14:03:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:58,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:58,880 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:59,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7260 [2021-06-05 14:03:59,081 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:59,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1756709082, now seen corresponding path program 81 times [2021-06-05 14:03:59,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:59,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757692314] [2021-06-05 14:03:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:59,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:59,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757692314] [2021-06-05 14:03:59,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757692314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:59,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939688046] [2021-06-05 14:03:59,268 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:59,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:03:59,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:59,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:59,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:59,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:03:59,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:59,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:59,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:59,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:03:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:59,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939688046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:59,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:59,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:03:59,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283218289] [2021-06-05 14:03:59,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:03:59,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:59,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:03:59,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:03:59,707 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:59,925 INFO L93 Difference]: Finished difference Result 222 states and 624 transitions. [2021-06-05 14:03:59,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:03:59,925 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:59,926 INFO L225 Difference]: With dead ends: 222 [2021-06-05 14:03:59,926 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 14:03:59,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 14:03:59,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2021-06-05 14:03:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.9019607843137254) internal successors, (592), 204 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 592 transitions. [2021-06-05 14:03:59,929 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 592 transitions. Word has length 17 [2021-06-05 14:03:59,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:59,929 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 592 transitions. [2021-06-05 14:03:59,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:03:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 592 transitions. [2021-06-05 14:03:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:03:59,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:59,930 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:00,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7261,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:00,130 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:00,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1679383684, now seen corresponding path program 82 times [2021-06-05 14:04:00,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:00,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147951868] [2021-06-05 14:04:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:00,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:00,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147951868] [2021-06-05 14:04:00,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147951868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:00,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188163127] [2021-06-05 14:04:00,296 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 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 14:04:00,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:00,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:00,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:04:00,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:00,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:00,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 14:04:00,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:04:00,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:00,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:04:01,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:01,095 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:04:01,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:01,095 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 14:04:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:01,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188163127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:01,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:01,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:01,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487794559] [2021-06-05 14:04:01,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:01,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:01,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:01,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:01,121 INFO L87 Difference]: Start difference. First operand 205 states and 592 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:04:01,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:01,445 INFO L93 Difference]: Finished difference Result 256 states and 697 transitions. [2021-06-05 14:04:01,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:04:01,446 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:04:01,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:01,447 INFO L225 Difference]: With dead ends: 256 [2021-06-05 14:04:01,447 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 14:04:01,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 352.3ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:04:01,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 14:04:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 204. [2021-06-05 14:04:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-06-05 14:04:01,450 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-06-05 14:04:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:01,450 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-06-05 14:04:01,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:04:01,450 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-06-05 14:04:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:04:01,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:01,451 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:01,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7335 [2021-06-05 14:04:01,661 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1604794505, now seen corresponding path program 83 times [2021-06-05 14:04:01,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:01,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296123315] [2021-06-05 14:04:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:01,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:01,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296123315] [2021-06-05 14:04:01,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296123315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:01,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980980445] [2021-06-05 14:04:01,690 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 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 14:04:01,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:01,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:01,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:04:01,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:01,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980980445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:01,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:01,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:04:01,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849997120] [2021-06-05 14:04:01,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:04:01,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:01,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:04:01,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:04:01,737 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 14:04:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:01,769 INFO L93 Difference]: Finished difference Result 345 states and 847 transitions. [2021-06-05 14:04:01,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:04:01,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 17 [2021-06-05 14:04:01,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:01,773 INFO L225 Difference]: With dead ends: 345 [2021-06-05 14:04:01,773 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 14:04:01,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:01,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 14:04:01,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 227. [2021-06-05 14:04:01,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.938053097345133) internal successors, (664), 226 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 664 transitions. [2021-06-05 14:04:01,778 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 664 transitions. Word has length 17 [2021-06-05 14:04:01,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:01,778 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 664 transitions. [2021-06-05 14:04:01,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 14:04:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 664 transitions. [2021-06-05 14:04:01,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:04:01,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:01,779 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:01,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7492 [2021-06-05 14:04:01,995 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:01,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:01,995 INFO L82 PathProgramCache]: Analyzing trace with hash 629312989, now seen corresponding path program 84 times [2021-06-05 14:04:01,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:01,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479953927] [2021-06-05 14:04:01,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:02,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:02,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479953927] [2021-06-05 14:04:02,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479953927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:02,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854688378] [2021-06-05 14:04:02,036 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 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 14:04:02,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:04:02,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:02,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:04:02,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:02,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854688378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:02,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:02,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:04:02,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699661843] [2021-06-05 14:04:02,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:04:02,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:02,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:04:02,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:02,086 INFO L87 Difference]: Start difference. First operand 227 states and 664 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:02,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:02,135 INFO L93 Difference]: Finished difference Result 369 states and 882 transitions. [2021-06-05 14:04:02,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:04:02,135 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:04:02,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:02,136 INFO L225 Difference]: With dead ends: 369 [2021-06-05 14:04:02,136 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 14:04:02,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:02,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 14:04:02,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 215. [2021-06-05 14:04:02,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2021-06-05 14:04:02,141 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 17 [2021-06-05 14:04:02,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:02,141 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2021-06-05 14:04:02,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:02,141 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2021-06-05 14:04:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:04:02,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:02,141 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:02,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7493 [2021-06-05 14:04:02,357 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:02,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1167168567, now seen corresponding path program 85 times [2021-06-05 14:04:02,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:02,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34336408] [2021-06-05 14:04:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:02,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:02,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34336408] [2021-06-05 14:04:02,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34336408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:02,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722185845] [2021-06-05 14:04:02,389 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:04:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:02,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:04:02,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:02,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722185845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:02,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:02,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:04:02,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144858359] [2021-06-05 14:04:02,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:02,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:02,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:02,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:02,465 INFO L87 Difference]: Start difference. First operand 215 states and 623 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:02,577 INFO L93 Difference]: Finished difference Result 388 states and 893 transitions. [2021-06-05 14:04:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:04:02,577 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:04:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:02,578 INFO L225 Difference]: With dead ends: 388 [2021-06-05 14:04:02,578 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 14:04:02,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:04:02,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 14:04:02,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 204. [2021-06-05 14:04:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.896551724137931) internal successors, (588), 203 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 588 transitions. [2021-06-05 14:04:02,582 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 588 transitions. Word has length 17 [2021-06-05 14:04:02,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:02,582 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 588 transitions. [2021-06-05 14:04:02,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 588 transitions. [2021-06-05 14:04:02,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:04:02,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:02,584 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:02,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7494,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:02,805 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:02,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:02,806 INFO L82 PathProgramCache]: Analyzing trace with hash 660822301, now seen corresponding path program 86 times [2021-06-05 14:04:02,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:02,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495065356] [2021-06-05 14:04:02,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:02,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:02,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495065356] [2021-06-05 14:04:02,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495065356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:02,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566558531] [2021-06-05 14:04:02,847 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 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 14:04:02,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:02,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:02,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:04:02,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:02,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566558531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:02,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:02,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:04:02,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114583670] [2021-06-05 14:04:02,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:02,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:02,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:02,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:02,910 INFO L87 Difference]: Start difference. First operand 204 states and 588 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:03,057 INFO L93 Difference]: Finished difference Result 319 states and 762 transitions. [2021-06-05 14:04:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:04:03,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:04:03,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:03,058 INFO L225 Difference]: With dead ends: 319 [2021-06-05 14:04:03,058 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 14:04:03,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:03,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 14:04:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 198. [2021-06-05 14:04:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.8934010152284264) internal successors, (570), 197 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 570 transitions. [2021-06-05 14:04:03,063 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 570 transitions. Word has length 17 [2021-06-05 14:04:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:03,063 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 570 transitions. [2021-06-05 14:04:03,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:03,063 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 570 transitions. [2021-06-05 14:04:03,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:04:03,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:03,063 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:03,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7495 [2021-06-05 14:04:03,273 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:03,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:03,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2143957239, now seen corresponding path program 87 times [2021-06-05 14:04:03,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:03,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108582521] [2021-06-05 14:04:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:03,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:03,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108582521] [2021-06-05 14:04:03,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108582521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:03,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220070675] [2021-06-05 14:04:03,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:04:03,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:04:03,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:03,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:04:03,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:03,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220070675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:03,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:03,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:04:03,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048272882] [2021-06-05 14:04:03,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:03,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:03,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:03,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:03,362 INFO L87 Difference]: Start difference. First operand 198 states and 570 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:03,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:03,498 INFO L93 Difference]: Finished difference Result 345 states and 840 transitions. [2021-06-05 14:04:03,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:04:03,498 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:04:03,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:03,499 INFO L225 Difference]: With dead ends: 345 [2021-06-05 14:04:03,499 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 14:04:03,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:04:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 14:04:03,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 202. [2021-06-05 14:04:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8955223880597014) internal successors, (582), 201 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 582 transitions. [2021-06-05 14:04:03,502 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 582 transitions. Word has length 17 [2021-06-05 14:04:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:03,502 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 582 transitions. [2021-06-05 14:04:03,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 582 transitions. [2021-06-05 14:04:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:04:03,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:03,502 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:03,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7496,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:03,703 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:03,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:03,703 INFO L82 PathProgramCache]: Analyzing trace with hash 45256516, now seen corresponding path program 88 times [2021-06-05 14:04:03,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:03,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431168831] [2021-06-05 14:04:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:03,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:03,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431168831] [2021-06-05 14:04:03,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431168831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:03,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021546196] [2021-06-05 14:04:03,855 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:03,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:03,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:03,878 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:04:03,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:04,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:04,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:04:04,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:04,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:04,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:04,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:04:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:04,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021546196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:04,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:04,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:04,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175140905] [2021-06-05 14:04:04,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:04,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:04,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:04,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:04,234 INFO L87 Difference]: Start difference. First operand 202 states and 582 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:04:04,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:04,475 INFO L93 Difference]: Finished difference Result 234 states and 664 transitions. [2021-06-05 14:04:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:04:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:04,476 INFO L225 Difference]: With dead ends: 234 [2021-06-05 14:04:04,476 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 14:04:04,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:04:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 14:04:04,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 212. [2021-06-05 14:04:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.928909952606635) internal successors, (618), 211 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 618 transitions. [2021-06-05 14:04:04,478 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 618 transitions. Word has length 17 [2021-06-05 14:04:04,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:04,479 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 618 transitions. [2021-06-05 14:04:04,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:04:04,479 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 618 transitions. [2021-06-05 14:04:04,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:04:04,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:04,479 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:04,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7497 [2021-06-05 14:04:04,681 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:04,681 INFO L82 PathProgramCache]: Analyzing trace with hash 904131046, now seen corresponding path program 89 times [2021-06-05 14:04:04,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:04,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135426207] [2021-06-05 14:04:04,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:04,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:04,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135426207] [2021-06-05 14:04:04,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135426207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:04,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021482580] [2021-06-05 14:04:04,821 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 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 14:04:04,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:04,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:04,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:04:04,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:05,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:05,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 14:04:05,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:04:05,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:05,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:04:05,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:05,889 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:04:05,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:05,890 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 14:04:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:05,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021482580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:05,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:05,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:05,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027130431] [2021-06-05 14:04:05,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:05,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:05,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:05,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:05,918 INFO L87 Difference]: Start difference. First operand 212 states and 618 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:04:06,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:06,305 INFO L93 Difference]: Finished difference Result 272 states and 753 transitions. [2021-06-05 14:04:06,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:04:06,305 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:04:06,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:06,306 INFO L225 Difference]: With dead ends: 272 [2021-06-05 14:04:06,306 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 14:04:06,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 367.0ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:04:06,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 14:04:06,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 212. [2021-06-05 14:04:06,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.933649289099526) internal successors, (619), 211 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:06,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 619 transitions. [2021-06-05 14:04:06,309 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 619 transitions. Word has length 17 [2021-06-05 14:04:06,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:06,309 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 619 transitions. [2021-06-05 14:04:06,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:04:06,309 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 619 transitions. [2021-06-05 14:04:06,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:04:06,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:06,309 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:06,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7561,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:06,510 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:06,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:06,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1680222942, now seen corresponding path program 90 times [2021-06-05 14:04:06,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:06,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828782202] [2021-06-05 14:04:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:06,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:06,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828782202] [2021-06-05 14:04:06,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828782202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:06,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650347128] [2021-06-05 14:04:06,635 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 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 14:04:06,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:04:06,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:06,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:04:06,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:06,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:06,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 14:04:07,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:04:07,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:07,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:04:07,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:07,635 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:04:07,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:07,635 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-06-05 14:04:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:07,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650347128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:07,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:07,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:07,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801624054] [2021-06-05 14:04:07,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:07,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:07,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:07,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:07,662 INFO L87 Difference]: Start difference. First operand 212 states and 619 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:04:08,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:08,347 INFO L93 Difference]: Finished difference Result 304 states and 812 transitions. [2021-06-05 14:04:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:04:08,348 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:04:08,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:08,348 INFO L225 Difference]: With dead ends: 304 [2021-06-05 14:04:08,348 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 14:04:08,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 555.6ms TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:04:08,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 14:04:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 213. [2021-06-05 14:04:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.938679245283019) internal successors, (623), 212 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 623 transitions. [2021-06-05 14:04:08,351 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 623 transitions. Word has length 17 [2021-06-05 14:04:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:08,351 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 623 transitions. [2021-06-05 14:04:08,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 14:04:08,351 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 623 transitions. [2021-06-05 14:04:08,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:04:08,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:08,352 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:08,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7744,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:08,552 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:08,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:08,552 INFO L82 PathProgramCache]: Analyzing trace with hash 978720225, now seen corresponding path program 91 times [2021-06-05 14:04:08,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:08,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992979027] [2021-06-05 14:04:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:08,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:08,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992979027] [2021-06-05 14:04:08,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992979027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:08,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27522805] [2021-06-05 14:04:08,597 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 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 14:04:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:08,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:04:08,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:08,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27522805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:08,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:08,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:04:08,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873502816] [2021-06-05 14:04:08,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:04:08,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:08,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:04:08,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:08,668 INFO L87 Difference]: Start difference. First operand 213 states and 623 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:04:08,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:08,721 INFO L93 Difference]: Finished difference Result 364 states and 870 transitions. [2021-06-05 14:04:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:04:08,721 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:04:08,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:08,722 INFO L225 Difference]: With dead ends: 364 [2021-06-05 14:04:08,722 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 14:04:08,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:08,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 14:04:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 220. [2021-06-05 14:04:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.954337899543379) internal successors, (647), 219 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 647 transitions. [2021-06-05 14:04:08,726 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 647 transitions. Word has length 17 [2021-06-05 14:04:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:08,726 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 647 transitions. [2021-06-05 14:04:08,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:04:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 647 transitions. [2021-06-05 14:04:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:04:08,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:08,726 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:08,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7944,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:08,949 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:08,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1082139577, now seen corresponding path program 92 times [2021-06-05 14:04:08,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:08,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964999439] [2021-06-05 14:04:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:08,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:08,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964999439] [2021-06-05 14:04:08,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964999439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:08,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030994352] [2021-06-05 14:04:08,994 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 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 14:04:09,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:09,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:09,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:04:09,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:09,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030994352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:09,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:09,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:04:09,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827037278] [2021-06-05 14:04:09,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:04:09,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:09,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:04:09,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:09,055 INFO L87 Difference]: Start difference. First operand 220 states and 647 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:04:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:09,115 INFO L93 Difference]: Finished difference Result 346 states and 892 transitions. [2021-06-05 14:04:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:04:09,115 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:04:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:09,116 INFO L225 Difference]: With dead ends: 346 [2021-06-05 14:04:09,116 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 14:04:09,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:09,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 14:04:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 250. [2021-06-05 14:04:09,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9759036144578315) internal successors, (741), 249 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 741 transitions. [2021-06-05 14:04:09,120 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 741 transitions. Word has length 17 [2021-06-05 14:04:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:09,120 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 741 transitions. [2021-06-05 14:04:09,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:04:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 741 transitions. [2021-06-05 14:04:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:04:09,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:09,121 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:09,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7945,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:09,333 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:09,333 INFO L82 PathProgramCache]: Analyzing trace with hash -544283999, now seen corresponding path program 93 times [2021-06-05 14:04:09,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:09,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650565130] [2021-06-05 14:04:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:09,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:09,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650565130] [2021-06-05 14:04:09,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650565130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:09,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632408668] [2021-06-05 14:04:09,377 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 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 14:04:09,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:09,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:09,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:04:09,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:09,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632408668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:09,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:09,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:04:09,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550230098] [2021-06-05 14:04:09,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:09,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:09,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:09,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:09,450 INFO L87 Difference]: Start difference. First operand 250 states and 741 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:09,529 INFO L93 Difference]: Finished difference Result 372 states and 930 transitions. [2021-06-05 14:04:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:04:09,530 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:04:09,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:09,530 INFO L225 Difference]: With dead ends: 372 [2021-06-05 14:04:09,530 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 14:04:09,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:04:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 14:04:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 247. [2021-06-05 14:04:09,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9715447154471546) internal successors, (731), 246 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 731 transitions. [2021-06-05 14:04:09,534 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 731 transitions. Word has length 17 [2021-06-05 14:04:09,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:09,534 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 731 transitions. [2021-06-05 14:04:09,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:09,534 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 731 transitions. [2021-06-05 14:04:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:04:09,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:09,534 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:09,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7946,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:09,735 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:09,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:09,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1050630265, now seen corresponding path program 94 times [2021-06-05 14:04:09,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:09,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139674725] [2021-06-05 14:04:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:09,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:09,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139674725] [2021-06-05 14:04:09,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139674725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:09,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837946019] [2021-06-05 14:04:09,783 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 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 14:04:09,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:09,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:09,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:04:09,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:09,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837946019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:09,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:09,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:04:09,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369426069] [2021-06-05 14:04:09,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:09,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:09,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:09,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:09,836 INFO L87 Difference]: Start difference. First operand 247 states and 731 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:09,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:09,943 INFO L93 Difference]: Finished difference Result 335 states and 866 transitions. [2021-06-05 14:04:09,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:04:09,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:04:09,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:09,944 INFO L225 Difference]: With dead ends: 335 [2021-06-05 14:04:09,944 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 14:04:09,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:09,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 14:04:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 244. [2021-06-05 14:04:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-06-05 14:04:09,947 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-06-05 14:04:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:09,947 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-06-05 14:04:09,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-06-05 14:04:09,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:04:09,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:09,948 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:10,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7947,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:10,148 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:10,149 INFO L82 PathProgramCache]: Analyzing trace with hash 432504673, now seen corresponding path program 95 times [2021-06-05 14:04:10,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:10,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196924309] [2021-06-05 14:04:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:10,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:10,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196924309] [2021-06-05 14:04:10,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196924309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:10,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788135469] [2021-06-05 14:04:10,185 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:10,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:10,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:10,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:04:10,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:10,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788135469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:10,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:10,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:04:10,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166095546] [2021-06-05 14:04:10,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:10,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:10,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:10,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:10,242 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:10,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:10,355 INFO L93 Difference]: Finished difference Result 346 states and 896 transitions. [2021-06-05 14:04:10,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:04:10,356 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:04:10,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:10,356 INFO L225 Difference]: With dead ends: 346 [2021-06-05 14:04:10,356 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 14:04:10,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 14:04:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 244. [2021-06-05 14:04:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-06-05 14:04:10,360 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-06-05 14:04:10,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:10,360 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-06-05 14:04:10,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-06-05 14:04:10,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:04:10,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:10,360 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:10,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7948,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:10,577 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash -834952505, now seen corresponding path program 96 times [2021-06-05 14:04:10,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:10,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696693074] [2021-06-05 14:04:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:10,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:10,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696693074] [2021-06-05 14:04:10,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696693074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:10,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551795156] [2021-06-05 14:04:10,623 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 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 14:04:10,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:10,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:10,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:04:10,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:10,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551795156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:10,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:10,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:04:10,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744106818] [2021-06-05 14:04:10,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:10,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:10,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:10,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:10,674 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:10,785 INFO L93 Difference]: Finished difference Result 385 states and 1019 transitions. [2021-06-05 14:04:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:04:10,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:04:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:10,786 INFO L225 Difference]: With dead ends: 385 [2021-06-05 14:04:10,786 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 14:04:10,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:10,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 14:04:10,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 252. [2021-06-05 14:04:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9721115537848606) internal successors, (746), 251 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 746 transitions. [2021-06-05 14:04:10,790 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 746 transitions. Word has length 17 [2021-06-05 14:04:10,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:10,790 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 746 transitions. [2021-06-05 14:04:10,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 746 transitions. [2021-06-05 14:04:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:10,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:10,790 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:10,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7949 [2021-06-05 14:04:10,991 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:10,991 INFO L82 PathProgramCache]: Analyzing trace with hash -702501620, now seen corresponding path program 97 times [2021-06-05 14:04:10,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:10,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803132366] [2021-06-05 14:04:10,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:11,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:11,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803132366] [2021-06-05 14:04:11,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803132366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:11,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871926001] [2021-06-05 14:04:11,066 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 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 14:04:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:11,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:04:11,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:11,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:11,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:12,127 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 216 [2021-06-05 14:04:12,232 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 217 [2021-06-05 14:04:12,346 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 217 [2021-06-05 14:04:12,462 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 221 [2021-06-05 14:04:12,607 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 232 [2021-06-05 14:04:12,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:12,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:12,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:12,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:12,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871926001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:12,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:12,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:12,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132317830] [2021-06-05 14:04:12,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:12,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:12,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:12,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:12,868 INFO L87 Difference]: Start difference. First operand 252 states and 746 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:04:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:13,140 INFO L93 Difference]: Finished difference Result 306 states and 891 transitions. [2021-06-05 14:04:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:13,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-06-05 14:04:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:13,141 INFO L225 Difference]: With dead ends: 306 [2021-06-05 14:04:13,141 INFO L226 Difference]: Without dead ends: 301 [2021-06-05 14:04:13,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:04:13,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-05 14:04:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 272. [2021-06-05 14:04:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-06-05 14:04:13,144 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-06-05 14:04:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:13,144 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-06-05 14:04:13,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:04:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-06-05 14:04:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:13,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:13,145 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:13,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7950 [2021-06-05 14:04:13,349 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:13,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:13,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1857651606, now seen corresponding path program 98 times [2021-06-05 14:04:13,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:13,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722308804] [2021-06-05 14:04:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:13,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:13,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722308804] [2021-06-05 14:04:13,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722308804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:13,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910819569] [2021-06-05 14:04:13,469 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 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 14:04:13,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:13,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:13,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:04:13,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:13,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:13,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:14,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:14,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:14,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:14,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:14,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910819569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:14,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:14,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:14,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003236801] [2021-06-05 14:04:14,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:14,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:14,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:14,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:14,363 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:14,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:14,946 INFO L93 Difference]: Finished difference Result 402 states and 1031 transitions. [2021-06-05 14:04:14,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:04:14,947 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:14,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:14,948 INFO L225 Difference]: With dead ends: 402 [2021-06-05 14:04:14,948 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 14:04:14,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 481.4ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:04:14,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 14:04:14,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 272. [2021-06-05 14:04:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-06-05 14:04:14,951 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-06-05 14:04:14,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:14,951 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-06-05 14:04:14,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:14,951 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-06-05 14:04:14,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:14,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:14,952 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:15,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8152 [2021-06-05 14:04:15,153 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:15,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:15,153 INFO L82 PathProgramCache]: Analyzing trace with hash 801291561, now seen corresponding path program 99 times [2021-06-05 14:04:15,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:15,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239112593] [2021-06-05 14:04:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:15,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:15,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239112593] [2021-06-05 14:04:15,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239112593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:15,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22750028] [2021-06-05 14:04:15,189 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 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 14:04:15,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:04:15,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:15,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:15,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:15,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22750028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:15,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:15,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:04:15,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149483618] [2021-06-05 14:04:15,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:15,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:15,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:15,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:15,243 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:15,292 INFO L93 Difference]: Finished difference Result 460 states and 1135 transitions. [2021-06-05 14:04:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:04:15,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:15,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:15,294 INFO L225 Difference]: With dead ends: 460 [2021-06-05 14:04:15,294 INFO L226 Difference]: Without dead ends: 460 [2021-06-05 14:04:15,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:15,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-06-05 14:04:15,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 274. [2021-06-05 14:04:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9963369963369964) internal successors, (818), 273 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 818 transitions. [2021-06-05 14:04:15,297 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 818 transitions. Word has length 18 [2021-06-05 14:04:15,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:15,297 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 818 transitions. [2021-06-05 14:04:15,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:15,297 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 818 transitions. [2021-06-05 14:04:15,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:15,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:15,298 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:15,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8259 [2021-06-05 14:04:15,498 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:15,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:15,499 INFO L82 PathProgramCache]: Analyzing trace with hash -640313607, now seen corresponding path program 100 times [2021-06-05 14:04:15,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:15,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855962339] [2021-06-05 14:04:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:15,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:15,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855962339] [2021-06-05 14:04:15,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855962339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:15,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765733010] [2021-06-05 14:04:15,539 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 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 14:04:15,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:15,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:15,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:15,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:15,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765733010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:15,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:15,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:04:15,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902016159] [2021-06-05 14:04:15,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:15,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:15,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:15,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:15,600 INFO L87 Difference]: Start difference. First operand 274 states and 818 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:15,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:15,670 INFO L93 Difference]: Finished difference Result 492 states and 1194 transitions. [2021-06-05 14:04:15,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:04:15,670 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:15,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:15,671 INFO L225 Difference]: With dead ends: 492 [2021-06-05 14:04:15,671 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 14:04:15,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:15,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 14:04:15,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 276. [2021-06-05 14:04:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-06-05 14:04:15,675 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-06-05 14:04:15,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:15,675 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-06-05 14:04:15,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-06-05 14:04:15,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:15,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:15,675 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:15,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8260 [2021-06-05 14:04:15,876 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1790860340, now seen corresponding path program 101 times [2021-06-05 14:04:15,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:15,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883010297] [2021-06-05 14:04:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:15,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:15,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883010297] [2021-06-05 14:04:15,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883010297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:15,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770229421] [2021-06-05 14:04:15,973 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 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 14:04:15,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:15,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:15,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:04:15,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:16,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:16,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:16,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:16,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:16,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:16,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:16,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770229421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:16,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:16,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:16,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535986082] [2021-06-05 14:04:16,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:16,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:16,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:16,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:16,581 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:04:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:16,811 INFO L93 Difference]: Finished difference Result 323 states and 904 transitions. [2021-06-05 14:04:16,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:04:16,811 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-06-05 14:04:16,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:16,812 INFO L225 Difference]: With dead ends: 323 [2021-06-05 14:04:16,812 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 14:04:16,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:04:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 14:04:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2021-06-05 14:04:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-06-05 14:04:16,815 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-06-05 14:04:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:16,816 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-06-05 14:04:16,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:04:16,816 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-06-05 14:04:16,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:16,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:16,817 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:17,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8261,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:17,040 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:17,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:17,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2026934802, now seen corresponding path program 102 times [2021-06-05 14:04:17,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:17,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716198393] [2021-06-05 14:04:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:17,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:17,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716198393] [2021-06-05 14:04:17,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716198393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:17,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775303445] [2021-06-05 14:04:17,137 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 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 14:04:17,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:17,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:17,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:04:17,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:17,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:17,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:18,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:18,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:18,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:18,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:18,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775303445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:18,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:18,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:18,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868814678] [2021-06-05 14:04:18,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:18,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:18,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:18,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:18,057 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:18,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:18,383 INFO L93 Difference]: Finished difference Result 333 states and 930 transitions. [2021-06-05 14:04:18,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:04:18,383 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:18,384 INFO L225 Difference]: With dead ends: 333 [2021-06-05 14:04:18,384 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 14:04:18,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 337.9ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:04:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 14:04:18,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 278. [2021-06-05 14:04:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9819494584837547) internal successors, (826), 277 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 826 transitions. [2021-06-05 14:04:18,387 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 826 transitions. Word has length 18 [2021-06-05 14:04:18,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:18,387 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 826 transitions. [2021-06-05 14:04:18,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:18,387 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 826 transitions. [2021-06-05 14:04:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:18,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:18,388 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:18,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8358 [2021-06-05 14:04:18,588 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:18,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1194947114, now seen corresponding path program 103 times [2021-06-05 14:04:18,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:18,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445410551] [2021-06-05 14:04:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:18,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:18,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445410551] [2021-06-05 14:04:18,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445410551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:18,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568449525] [2021-06-05 14:04:18,663 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 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 14:04:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:18,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:04:18,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:18,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:18,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:19,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:19,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:19,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:19,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:19,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568449525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:19,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:19,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:19,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053591009] [2021-06-05 14:04:19,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:19,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:19,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:19,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:19,947 INFO L87 Difference]: Start difference. First operand 278 states and 826 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:20,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:20,405 INFO L93 Difference]: Finished difference Result 351 states and 960 transitions. [2021-06-05 14:04:20,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:04:20,405 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:20,406 INFO L225 Difference]: With dead ends: 351 [2021-06-05 14:04:20,406 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 14:04:20,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:04:20,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 14:04:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 280. [2021-06-05 14:04:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-06-05 14:04:20,410 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-06-05 14:04:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:20,411 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-06-05 14:04:20,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-06-05 14:04:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:20,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:20,411 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:20,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8465 [2021-06-05 14:04:20,612 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:20,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1914566441, now seen corresponding path program 104 times [2021-06-05 14:04:20,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:20,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254283966] [2021-06-05 14:04:20,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:20,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:20,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254283966] [2021-06-05 14:04:20,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254283966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:20,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598248078] [2021-06-05 14:04:20,660 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 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 14:04:20,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:20,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:20,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:20,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:20,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598248078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:20,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:20,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:20,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482379716] [2021-06-05 14:04:20,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:20,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:20,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:20,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:20,710 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:20,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:20,795 INFO L93 Difference]: Finished difference Result 527 states and 1263 transitions. [2021-06-05 14:04:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:04:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:20,796 INFO L225 Difference]: With dead ends: 527 [2021-06-05 14:04:20,796 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 14:04:20,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:04:20,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 14:04:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 280. [2021-06-05 14:04:20,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:20,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-06-05 14:04:20,800 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-06-05 14:04:20,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:20,800 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-06-05 14:04:20,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:20,800 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-06-05 14:04:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:20,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:20,800 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:21,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8636,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:21,001 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:21,001 INFO L82 PathProgramCache]: Analyzing trace with hash 607356086, now seen corresponding path program 105 times [2021-06-05 14:04:21,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:21,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074832681] [2021-06-05 14:04:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:21,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:21,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074832681] [2021-06-05 14:04:21,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074832681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:21,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401696031] [2021-06-05 14:04:21,094 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 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 14:04:21,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:21,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:21,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:04:21,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:21,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:21,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:21,924 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 284 [2021-06-05 14:04:22,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:22,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:22,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:22,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:22,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401696031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:22,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:22,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:22,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92811303] [2021-06-05 14:04:22,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:22,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:22,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:22,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:22,777 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:04:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:22,969 INFO L93 Difference]: Finished difference Result 307 states and 875 transitions. [2021-06-05 14:04:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:04:22,970 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-06-05 14:04:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:22,970 INFO L225 Difference]: With dead ends: 307 [2021-06-05 14:04:22,970 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 14:04:22,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:04:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 14:04:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 280. [2021-06-05 14:04:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-06-05 14:04:22,973 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-06-05 14:04:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:22,974 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-06-05 14:04:22,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:04:22,974 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-06-05 14:04:22,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:22,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:22,974 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:23,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8637 [2021-06-05 14:04:23,175 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:23,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:23,175 INFO L82 PathProgramCache]: Analyzing trace with hash -520040007, now seen corresponding path program 106 times [2021-06-05 14:04:23,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:23,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823623559] [2021-06-05 14:04:23,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:23,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:23,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823623559] [2021-06-05 14:04:23,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823623559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:23,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788842368] [2021-06-05 14:04:23,205 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 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 14:04:23,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:23,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:23,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:23,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:23,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788842368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:23,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:23,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:04:23,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56532094] [2021-06-05 14:04:23,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:04:23,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:23,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:04:23,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:23,255 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:23,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:23,311 INFO L93 Difference]: Finished difference Result 474 states and 1151 transitions. [2021-06-05 14:04:23,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:04:23,311 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:23,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:23,312 INFO L225 Difference]: With dead ends: 474 [2021-06-05 14:04:23,312 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 14:04:23,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 14:04:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 291. [2021-06-05 14:04:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.986206896551724) internal successors, (866), 290 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 866 transitions. [2021-06-05 14:04:23,316 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 866 transitions. Word has length 18 [2021-06-05 14:04:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:23,316 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 866 transitions. [2021-06-05 14:04:23,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 866 transitions. [2021-06-05 14:04:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:23,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:23,316 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:23,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8817,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:23,517 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:23,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:23,517 INFO L82 PathProgramCache]: Analyzing trace with hash -701803756, now seen corresponding path program 107 times [2021-06-05 14:04:23,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:23,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285607385] [2021-06-05 14:04:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:23,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:23,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285607385] [2021-06-05 14:04:23,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285607385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:23,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426986182] [2021-06-05 14:04:23,606 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 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 14:04:23,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:23,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:23,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:04:23,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:23,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:23,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:24,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:24,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:24,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:24,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:24,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426986182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:24,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:24,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:24,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095752394] [2021-06-05 14:04:24,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:24,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:24,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:24,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:24,359 INFO L87 Difference]: Start difference. First operand 291 states and 866 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:24,775 INFO L93 Difference]: Finished difference Result 373 states and 1019 transitions. [2021-06-05 14:04:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:04:24,775 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:24,776 INFO L225 Difference]: With dead ends: 373 [2021-06-05 14:04:24,776 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 14:04:24,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:04:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 14:04:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 291. [2021-06-05 14:04:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-06-05 14:04:24,780 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 18 [2021-06-05 14:04:24,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:24,780 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-06-05 14:04:24,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:24,780 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-06-05 14:04:24,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:24,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:24,780 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:24,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8818,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:24,981 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:24,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:24,981 INFO L82 PathProgramCache]: Analyzing trace with hash 17815571, now seen corresponding path program 108 times [2021-06-05 14:04:24,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:24,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958678671] [2021-06-05 14:04:24,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:25,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:25,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958678671] [2021-06-05 14:04:25,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958678671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:25,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830048683] [2021-06-05 14:04:25,030 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 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 14:04:25,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:25,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:25,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:25,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:25,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830048683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:25,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:25,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:25,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996501922] [2021-06-05 14:04:25,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:25,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:25,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:25,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:25,089 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:25,179 INFO L93 Difference]: Finished difference Result 514 states and 1221 transitions. [2021-06-05 14:04:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:04:25,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:25,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:25,180 INFO L225 Difference]: With dead ends: 514 [2021-06-05 14:04:25,180 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 14:04:25,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:04:25,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 14:04:25,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 280. [2021-06-05 14:04:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.949820788530466) internal successors, (823), 279 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 823 transitions. [2021-06-05 14:04:25,184 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 823 transitions. Word has length 18 [2021-06-05 14:04:25,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:25,184 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 823 transitions. [2021-06-05 14:04:25,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:25,184 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 823 transitions. [2021-06-05 14:04:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:25,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:25,184 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:25,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8931,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:25,385 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:25,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:25,385 INFO L82 PathProgramCache]: Analyzing trace with hash -488530695, now seen corresponding path program 109 times [2021-06-05 14:04:25,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:25,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277695127] [2021-06-05 14:04:25,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:25,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:25,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277695127] [2021-06-05 14:04:25,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277695127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:25,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415063232] [2021-06-05 14:04:25,423 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 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 14:04:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:25,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:25,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:25,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415063232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:25,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:25,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:25,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361377786] [2021-06-05 14:04:25,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:25,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:25,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:25,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:25,477 INFO L87 Difference]: Start difference. First operand 280 states and 823 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 14:04:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:25,613 INFO L93 Difference]: Finished difference Result 554 states and 1291 transitions. [2021-06-05 14:04:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:25,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:25,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:25,614 INFO L225 Difference]: With dead ends: 554 [2021-06-05 14:04:25,614 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 14:04:25,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:25,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 14:04:25,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 283. [2021-06-05 14:04:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9397163120567376) internal successors, (829), 282 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:25,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 829 transitions. [2021-06-05 14:04:25,618 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 829 transitions. Word has length 18 [2021-06-05 14:04:25,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:25,618 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 829 transitions. [2021-06-05 14:04:25,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 14:04:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 829 transitions. [2021-06-05 14:04:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:25,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:25,618 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:25,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8932,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:25,819 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:25,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1937621260, now seen corresponding path program 110 times [2021-06-05 14:04:25,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:25,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979289470] [2021-06-05 14:04:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:25,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:25,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979289470] [2021-06-05 14:04:25,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979289470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:25,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552031812] [2021-06-05 14:04:25,914 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 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 14:04:25,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:25,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:25,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:04:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:26,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:26,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:26,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:26,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:26,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:26,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:26,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552031812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:26,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:26,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:26,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625714143] [2021-06-05 14:04:26,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:26,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:26,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:26,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:26,545 INFO L87 Difference]: Start difference. First operand 283 states and 829 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:04:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:26,782 INFO L93 Difference]: Finished difference Result 301 states and 868 transitions. [2021-06-05 14:04:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:26,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-06-05 14:04:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:26,783 INFO L225 Difference]: With dead ends: 301 [2021-06-05 14:04:26,783 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 14:04:26,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:26,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 14:04:26,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2021-06-05 14:04:26,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.943462897526502) internal successors, (833), 283 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 833 transitions. [2021-06-05 14:04:26,787 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 833 transitions. Word has length 18 [2021-06-05 14:04:26,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:26,788 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 833 transitions. [2021-06-05 14:04:26,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:04:26,788 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 833 transitions. [2021-06-05 14:04:26,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:26,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:26,788 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:27,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8933,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:27,009 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:27,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1423882327, now seen corresponding path program 111 times [2021-06-05 14:04:27,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:27,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718644997] [2021-06-05 14:04:27,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:27,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:27,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718644997] [2021-06-05 14:04:27,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718644997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:27,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660914162] [2021-06-05 14:04:27,036 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 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 14:04:27,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:04:27,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:27,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:27,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:04:27,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660914162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:27,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:27,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:04:27,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029879694] [2021-06-05 14:04:27,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:04:27,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:27,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:04:27,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:04:27,087 INFO L87 Difference]: Start difference. First operand 284 states and 833 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 14:04:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:27,123 INFO L93 Difference]: Finished difference Result 435 states and 1110 transitions. [2021-06-05 14:04:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:04:27,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 18 [2021-06-05 14:04:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:27,124 INFO L225 Difference]: With dead ends: 435 [2021-06-05 14:04:27,124 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 14:04:27,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 14:04:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 311. [2021-06-05 14:04:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.967741935483871) internal successors, (920), 310 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 920 transitions. [2021-06-05 14:04:27,129 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 920 transitions. Word has length 18 [2021-06-05 14:04:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:27,129 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 920 transitions. [2021-06-05 14:04:27,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 14:04:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 920 transitions. [2021-06-05 14:04:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:27,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:27,130 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:27,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9072,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:27,336 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:27,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:27,336 INFO L82 PathProgramCache]: Analyzing trace with hash 810225167, now seen corresponding path program 112 times [2021-06-05 14:04:27,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:27,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673463652] [2021-06-05 14:04:27,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:27,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:27,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673463652] [2021-06-05 14:04:27,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673463652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:27,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626398808] [2021-06-05 14:04:27,384 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 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 14:04:27,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:27,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:27,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:27,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:27,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626398808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:27,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:27,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:04:27,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716738145] [2021-06-05 14:04:27,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:04:27,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:27,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:04:27,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:27,458 INFO L87 Difference]: Start difference. First operand 311 states and 920 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:27,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:27,522 INFO L93 Difference]: Finished difference Result 471 states and 1163 transitions. [2021-06-05 14:04:27,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:04:27,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:27,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:27,524 INFO L225 Difference]: With dead ends: 471 [2021-06-05 14:04:27,524 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 14:04:27,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:27,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 14:04:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 309. [2021-06-05 14:04:27,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9642857142857144) internal successors, (913), 308 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:27,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 913 transitions. [2021-06-05 14:04:27,529 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 913 transitions. Word has length 18 [2021-06-05 14:04:27,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:27,530 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 913 transitions. [2021-06-05 14:04:27,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:27,530 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 913 transitions. [2021-06-05 14:04:27,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:27,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:27,530 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:27,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9073 [2021-06-05 14:04:27,752 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:27,752 INFO L82 PathProgramCache]: Analyzing trace with hash 628461418, now seen corresponding path program 113 times [2021-06-05 14:04:27,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:27,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413667266] [2021-06-05 14:04:27,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:27,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:27,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413667266] [2021-06-05 14:04:27,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413667266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:27,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067416350] [2021-06-05 14:04:27,851 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 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 14:04:27,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:27,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:27,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:04:27,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:28,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:28,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:28,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:28,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:28,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:28,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:28,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067416350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:28,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:28,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:28,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281284012] [2021-06-05 14:04:28,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:28,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:28,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:28,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:28,587 INFO L87 Difference]: Start difference. First operand 309 states and 913 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:28,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:28,870 INFO L93 Difference]: Finished difference Result 383 states and 1039 transitions. [2021-06-05 14:04:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:04:28,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:28,871 INFO L225 Difference]: With dead ends: 383 [2021-06-05 14:04:28,872 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 14:04:28,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 14:04:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 309. [2021-06-05 14:04:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-06-05 14:04:28,876 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-06-05 14:04:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:28,877 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-06-05 14:04:28,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-06-05 14:04:28,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:28,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:28,877 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:29,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9074,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:29,093 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:29,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:29,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1348080745, now seen corresponding path program 114 times [2021-06-05 14:04:29,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:29,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846135371] [2021-06-05 14:04:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:29,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:29,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846135371] [2021-06-05 14:04:29,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846135371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:29,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352831549] [2021-06-05 14:04:29,131 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 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 14:04:29,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:29,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:29,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:29,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:29,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352831549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:29,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:29,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:29,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775671379] [2021-06-05 14:04:29,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:29,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:29,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:29,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:29,186 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:29,270 INFO L93 Difference]: Finished difference Result 503 states and 1214 transitions. [2021-06-05 14:04:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:04:29,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:29,271 INFO L225 Difference]: With dead ends: 503 [2021-06-05 14:04:29,271 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 14:04:29,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:04:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 14:04:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 309. [2021-06-05 14:04:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-06-05 14:04:29,276 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-06-05 14:04:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:29,277 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-06-05 14:04:29,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-06-05 14:04:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:29,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:29,278 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:29,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9205 [2021-06-05 14:04:29,501 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:29,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:29,501 INFO L82 PathProgramCache]: Analyzing trace with hash 841734479, now seen corresponding path program 115 times [2021-06-05 14:04:29,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:29,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878483871] [2021-06-05 14:04:29,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:29,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:29,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878483871] [2021-06-05 14:04:29,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878483871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:29,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288032924] [2021-06-05 14:04:29,537 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 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 14:04:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:29,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:29,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:29,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288032924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:29,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:29,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:29,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360752345] [2021-06-05 14:04:29,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:29,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:29,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:29,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:29,597 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 14:04:29,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:29,723 INFO L93 Difference]: Finished difference Result 546 states and 1298 transitions. [2021-06-05 14:04:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:04:29,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:29,724 INFO L225 Difference]: With dead ends: 546 [2021-06-05 14:04:29,724 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 14:04:29,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:29,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 14:04:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 309. [2021-06-05 14:04:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-06-05 14:04:29,728 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-06-05 14:04:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:29,728 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-06-05 14:04:29,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 14:04:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-06-05 14:04:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:29,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:29,729 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:29,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9206,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:29,930 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:29,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1970097879, now seen corresponding path program 116 times [2021-06-05 14:04:29,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:29,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260387217] [2021-06-05 14:04:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:29,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:29,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260387217] [2021-06-05 14:04:29,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260387217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:29,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313574823] [2021-06-05 14:04:29,969 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 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 14:04:29,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:29,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:29,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:29,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:30,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313574823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:30,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:30,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:30,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319467885] [2021-06-05 14:04:30,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:30,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:30,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:30,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:30,025 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 14:04:30,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:30,180 INFO L93 Difference]: Finished difference Result 544 states and 1360 transitions. [2021-06-05 14:04:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:30,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:30,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:30,182 INFO L225 Difference]: With dead ends: 544 [2021-06-05 14:04:30,182 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 14:04:30,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:30,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 14:04:30,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 311. [2021-06-05 14:04:30,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9548387096774196) internal successors, (916), 310 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:30,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2021-06-05 14:04:30,187 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 18 [2021-06-05 14:04:30,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:30,188 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2021-06-05 14:04:30,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 14:04:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2021-06-05 14:04:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:30,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:30,188 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:30,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9207,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:30,408 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:30,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:30,408 INFO L82 PathProgramCache]: Analyzing trace with hash 226168694, now seen corresponding path program 117 times [2021-06-05 14:04:30,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:30,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157610192] [2021-06-05 14:04:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:30,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:30,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157610192] [2021-06-05 14:04:30,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157610192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:30,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092061595] [2021-06-05 14:04:30,498 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 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 14:04:30,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:30,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:30,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 14:04:30,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:30,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:30,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:31,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:31,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:31,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:31,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:31,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092061595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:31,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:31,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:31,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333443747] [2021-06-05 14:04:31,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:31,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:31,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:31,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:31,156 INFO L87 Difference]: Start difference. First operand 311 states and 916 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:04:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:31,493 INFO L93 Difference]: Finished difference Result 365 states and 1058 transitions. [2021-06-05 14:04:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:04:31,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-06-05 14:04:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:31,494 INFO L225 Difference]: With dead ends: 365 [2021-06-05 14:04:31,494 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 14:04:31,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:31,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 14:04:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 329. [2021-06-05 14:04:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-06-05 14:04:31,498 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-06-05 14:04:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:31,498 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-06-05 14:04:31,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:04:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-06-05 14:04:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:31,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:31,499 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:31,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9208,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:31,700 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:31,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:31,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1499310764, now seen corresponding path program 118 times [2021-06-05 14:04:31,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:31,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527855116] [2021-06-05 14:04:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:31,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:31,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527855116] [2021-06-05 14:04:31,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527855116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:31,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480406235] [2021-06-05 14:04:31,790 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 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 14:04:31,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:31,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:31,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:04:31,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:32,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:32,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:32,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:32,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:32,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:32,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:32,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480406235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:32,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:32,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:32,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061965707] [2021-06-05 14:04:32,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:32,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:32,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:32,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:32,923 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:33,215 INFO L93 Difference]: Finished difference Result 375 states and 1069 transitions. [2021-06-05 14:04:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:04:33,215 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:33,216 INFO L225 Difference]: With dead ends: 375 [2021-06-05 14:04:33,216 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 14:04:33,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:04:33,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 14:04:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 329. [2021-06-05 14:04:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:33,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-06-05 14:04:33,221 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-06-05 14:04:33,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:33,222 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-06-05 14:04:33,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:33,222 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-06-05 14:04:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:33,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:33,222 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:33,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9304 [2021-06-05 14:04:33,437 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:33,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1159632403, now seen corresponding path program 119 times [2021-06-05 14:04:33,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:33,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752408315] [2021-06-05 14:04:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:33,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:33,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752408315] [2021-06-05 14:04:33,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752408315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:33,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271126197] [2021-06-05 14:04:33,472 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 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 14:04:33,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:33,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:33,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:33,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:33,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271126197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:33,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:33,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:04:33,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610678852] [2021-06-05 14:04:33,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:04:33,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:33,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:04:33,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:33,526 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:33,572 INFO L93 Difference]: Finished difference Result 498 states and 1262 transitions. [2021-06-05 14:04:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:04:33,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:33,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:33,577 INFO L225 Difference]: With dead ends: 498 [2021-06-05 14:04:33,578 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 14:04:33,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 14:04:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 300. [2021-06-05 14:04:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9732441471571907) internal successors, (889), 299 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 889 transitions. [2021-06-05 14:04:33,583 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 889 transitions. Word has length 18 [2021-06-05 14:04:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:33,583 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 889 transitions. [2021-06-05 14:04:33,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 889 transitions. [2021-06-05 14:04:33,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:33,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:33,584 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:33,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9489 [2021-06-05 14:04:33,797 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:33,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:33,797 INFO L82 PathProgramCache]: Analyzing trace with hash -901227399, now seen corresponding path program 120 times [2021-06-05 14:04:33,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:33,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114209597] [2021-06-05 14:04:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:33,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:33,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114209597] [2021-06-05 14:04:33,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114209597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:33,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582776780] [2021-06-05 14:04:33,837 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 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 14:04:33,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:33,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:33,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:33,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:33,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582776780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:33,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:33,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:04:33,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169953422] [2021-06-05 14:04:33,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:04:33,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:33,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:04:33,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:33,916 INFO L87 Difference]: Start difference. First operand 300 states and 889 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:33,968 INFO L93 Difference]: Finished difference Result 440 states and 1150 transitions. [2021-06-05 14:04:33,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:04:33,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:33,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:33,969 INFO L225 Difference]: With dead ends: 440 [2021-06-05 14:04:33,969 INFO L226 Difference]: Without dead ends: 440 [2021-06-05 14:04:33,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-05 14:04:33,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 328. [2021-06-05 14:04:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9877675840978593) internal successors, (977), 327 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 977 transitions. [2021-06-05 14:04:33,974 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 977 transitions. Word has length 18 [2021-06-05 14:04:33,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:33,974 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 977 transitions. [2021-06-05 14:04:33,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:33,974 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 977 transitions. [2021-06-05 14:04:33,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:33,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:33,988 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:34,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9490,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:34,205 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:34,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1082991148, now seen corresponding path program 121 times [2021-06-05 14:04:34,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:34,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203583182] [2021-06-05 14:04:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:34,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:34,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203583182] [2021-06-05 14:04:34,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203583182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:34,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134092755] [2021-06-05 14:04:34,284 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 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 14:04:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:34,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:04:34,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:34,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:34,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:35,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:35,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:35,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:35,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:35,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134092755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:35,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:35,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:35,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918169412] [2021-06-05 14:04:35,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:35,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:35,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:35,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:35,205 INFO L87 Difference]: Start difference. First operand 328 states and 977 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:35,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:35,487 INFO L93 Difference]: Finished difference Result 386 states and 1061 transitions. [2021-06-05 14:04:35,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:04:35,488 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:35,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:35,488 INFO L225 Difference]: With dead ends: 386 [2021-06-05 14:04:35,488 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 14:04:35,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 14:04:35,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 328. [2021-06-05 14:04:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.984709480122324) internal successors, (976), 327 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 976 transitions. [2021-06-05 14:04:35,492 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 976 transitions. Word has length 18 [2021-06-05 14:04:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:35,492 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 976 transitions. [2021-06-05 14:04:35,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 976 transitions. [2021-06-05 14:04:35,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:35,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:35,492 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:35,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9491,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:35,693 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:35,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:35,693 INFO L82 PathProgramCache]: Analyzing trace with hash -363371821, now seen corresponding path program 122 times [2021-06-05 14:04:35,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:35,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804874592] [2021-06-05 14:04:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:35,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:35,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804874592] [2021-06-05 14:04:35,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804874592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:35,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586764117] [2021-06-05 14:04:35,729 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 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 14:04:35,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:35,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:35,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:35,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:35,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586764117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:35,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:35,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:35,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448604430] [2021-06-05 14:04:35,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:35,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:35,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:35,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:35,778 INFO L87 Difference]: Start difference. First operand 328 states and 976 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:35,845 INFO L93 Difference]: Finished difference Result 472 states and 1196 transitions. [2021-06-05 14:04:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:04:35,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:35,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:35,846 INFO L225 Difference]: With dead ends: 472 [2021-06-05 14:04:35,846 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 14:04:35,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:04:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 14:04:35,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 312. [2021-06-05 14:04:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9710610932475885) internal successors, (924), 311 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 924 transitions. [2021-06-05 14:04:35,851 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 924 transitions. Word has length 18 [2021-06-05 14:04:35,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:35,851 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 924 transitions. [2021-06-05 14:04:35,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:35,852 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 924 transitions. [2021-06-05 14:04:35,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:35,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:35,852 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:36,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9650 [2021-06-05 14:04:36,069 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:36,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:36,069 INFO L82 PathProgramCache]: Analyzing trace with hash -869718087, now seen corresponding path program 123 times [2021-06-05 14:04:36,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:36,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780357003] [2021-06-05 14:04:36,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:36,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:36,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780357003] [2021-06-05 14:04:36,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780357003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:36,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498136426] [2021-06-05 14:04:36,103 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 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 14:04:36,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:04:36,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:36,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:36,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:36,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498136426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:36,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:36,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:36,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611827347] [2021-06-05 14:04:36,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:36,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:36,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:36,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:36,159 INFO L87 Difference]: Start difference. First operand 312 states and 924 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 14:04:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:36,302 INFO L93 Difference]: Finished difference Result 490 states and 1202 transitions. [2021-06-05 14:04:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:04:36,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:36,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:36,303 INFO L225 Difference]: With dead ends: 490 [2021-06-05 14:04:36,304 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 14:04:36,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:36,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 14:04:36,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 300. [2021-06-05 14:04:36,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9665551839464883) internal successors, (887), 299 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 887 transitions. [2021-06-05 14:04:36,309 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 887 transitions. Word has length 18 [2021-06-05 14:04:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:36,309 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 887 transitions. [2021-06-05 14:04:36,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 14:04:36,309 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 887 transitions. [2021-06-05 14:04:36,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:36,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:36,309 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:36,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9651,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:36,522 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:36,522 INFO L82 PathProgramCache]: Analyzing trace with hash 613416851, now seen corresponding path program 124 times [2021-06-05 14:04:36,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:36,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722981435] [2021-06-05 14:04:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:36,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:36,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722981435] [2021-06-05 14:04:36,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722981435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:36,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456509772] [2021-06-05 14:04:36,560 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 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 14:04:36,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:36,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:36,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:36,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:36,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456509772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:36,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:36,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:36,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127149060] [2021-06-05 14:04:36,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:36,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:36,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:36,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:36,617 INFO L87 Difference]: Start difference. First operand 300 states and 887 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 14:04:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:36,762 INFO L93 Difference]: Finished difference Result 433 states and 1094 transitions. [2021-06-05 14:04:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:04:36,762 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:36,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:36,763 INFO L225 Difference]: With dead ends: 433 [2021-06-05 14:04:36,763 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 14:04:36,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:04:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 14:04:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 294. [2021-06-05 14:04:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 14:04:36,766 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 18 [2021-06-05 14:04:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:36,766 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 14:04:36,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 14:04:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 14:04:36,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:36,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:36,767 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:36,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9652 [2021-06-05 14:04:36,981 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:36,981 INFO L82 PathProgramCache]: Analyzing trace with hash -654040327, now seen corresponding path program 125 times [2021-06-05 14:04:36,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:36,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100054798] [2021-06-05 14:04:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:37,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:37,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100054798] [2021-06-05 14:04:37,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100054798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:37,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983515681] [2021-06-05 14:04:37,021 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 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 14:04:37,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:04:37,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:37,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:37,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:37,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983515681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:37,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:37,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:37,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148459601] [2021-06-05 14:04:37,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:37,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:37,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:37,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:37,079 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 14:04:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:37,245 INFO L93 Difference]: Finished difference Result 474 states and 1217 transitions. [2021-06-05 14:04:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:37,245 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:37,245 INFO L225 Difference]: With dead ends: 474 [2021-06-05 14:04:37,245 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 14:04:37,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 14:04:37,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 298. [2021-06-05 14:04:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9663299663299663) internal successors, (881), 297 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 881 transitions. [2021-06-05 14:04:37,249 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 881 transitions. Word has length 18 [2021-06-05 14:04:37,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:37,249 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 881 transitions. [2021-06-05 14:04:37,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 14:04:37,249 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 881 transitions. [2021-06-05 14:04:37,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:37,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:37,250 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:37,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9653 [2021-06-05 14:04:37,450 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:37,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:37,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1289253300, now seen corresponding path program 126 times [2021-06-05 14:04:37,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:37,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948694089] [2021-06-05 14:04:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:37,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:37,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948694089] [2021-06-05 14:04:37,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948694089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:37,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945140091] [2021-06-05 14:04:37,546 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 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 14:04:37,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:04:37,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:37,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:04:37,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:37,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:37,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:38,889 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 234 [2021-06-05 14:04:39,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:39,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:39,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:39,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:39,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945140091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:39,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:39,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:39,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7290043] [2021-06-05 14:04:39,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:39,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:39,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:39,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:39,102 INFO L87 Difference]: Start difference. First operand 298 states and 881 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:04:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:39,511 INFO L93 Difference]: Finished difference Result 381 states and 1116 transitions. [2021-06-05 14:04:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:39,511 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-06-05 14:04:39,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:39,512 INFO L225 Difference]: With dead ends: 381 [2021-06-05 14:04:39,512 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 14:04:39,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:39,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 14:04:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 341. [2021-06-05 14:04:39,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:39,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-06-05 14:04:39,516 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-06-05 14:04:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:39,516 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-06-05 14:04:39,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:04:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-06-05 14:04:39,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:39,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:39,516 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:39,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9654 [2021-06-05 14:04:39,717 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:39,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:39,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1280234538, now seen corresponding path program 127 times [2021-06-05 14:04:39,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:39,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381359371] [2021-06-05 14:04:39,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:39,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:39,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381359371] [2021-06-05 14:04:39,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381359371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:39,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534316701] [2021-06-05 14:04:39,815 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 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 14:04:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:39,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:04:39,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:40,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:40,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:41,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:41,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:41,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:41,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:41,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534316701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:41,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:41,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:41,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727989179] [2021-06-05 14:04:41,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:41,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:41,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:41,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:41,045 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:41,468 INFO L93 Difference]: Finished difference Result 396 states and 1134 transitions. [2021-06-05 14:04:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:04:41,468 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:41,469 INFO L225 Difference]: With dead ends: 396 [2021-06-05 14:04:41,469 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 14:04:41,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:04:41,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 14:04:41,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 341. [2021-06-05 14:04:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-06-05 14:04:41,473 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-06-05 14:04:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:41,473 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-06-05 14:04:41,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-06-05 14:04:41,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:41,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:41,474 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:41,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9843,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:41,674 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:41,674 INFO L82 PathProgramCache]: Analyzing trace with hash -355789591, now seen corresponding path program 128 times [2021-06-05 14:04:41,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:41,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376994294] [2021-06-05 14:04:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:41,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:41,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376994294] [2021-06-05 14:04:41,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376994294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:41,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771029239] [2021-06-05 14:04:41,725 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 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 14:04:41,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:41,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:41,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:41,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:41,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771029239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:41,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:41,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:41,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170312688] [2021-06-05 14:04:41,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:41,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:41,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:41,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:41,776 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:41,831 INFO L93 Difference]: Finished difference Result 539 states and 1358 transitions. [2021-06-05 14:04:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:04:41,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:41,832 INFO L225 Difference]: With dead ends: 539 [2021-06-05 14:04:41,832 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 14:04:41,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:41,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 14:04:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 352. [2021-06-05 14:04:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.0484330484330484) internal successors, (1070), 351 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1070 transitions. [2021-06-05 14:04:41,837 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1070 transitions. Word has length 18 [2021-06-05 14:04:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:41,837 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1070 transitions. [2021-06-05 14:04:41,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1070 transitions. [2021-06-05 14:04:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:41,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:41,838 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:42,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10082 [2021-06-05 14:04:42,053 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1878317903, now seen corresponding path program 129 times [2021-06-05 14:04:42,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:42,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964229380] [2021-06-05 14:04:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:42,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:42,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964229380] [2021-06-05 14:04:42,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964229380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:42,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146869699] [2021-06-05 14:04:42,098 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 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 14:04:42,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:42,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:42,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:42,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:42,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146869699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:42,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:42,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:42,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198791620] [2021-06-05 14:04:42,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:42,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:42,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:42,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:42,160 INFO L87 Difference]: Start difference. First operand 352 states and 1070 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:42,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:42,220 INFO L93 Difference]: Finished difference Result 516 states and 1352 transitions. [2021-06-05 14:04:42,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:04:42,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:42,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:42,221 INFO L225 Difference]: With dead ends: 516 [2021-06-05 14:04:42,221 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 14:04:42,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:42,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 14:04:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 368. [2021-06-05 14:04:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-06-05 14:04:42,225 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-06-05 14:04:42,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:42,225 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-06-05 14:04:42,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:42,225 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-06-05 14:04:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:42,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:42,226 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:42,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10083 [2021-06-05 14:04:42,426 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1696554154, now seen corresponding path program 130 times [2021-06-05 14:04:42,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:42,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035430660] [2021-06-05 14:04:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:42,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:42,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035430660] [2021-06-05 14:04:42,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035430660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:42,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361976059] [2021-06-05 14:04:42,504 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:42,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:42,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:42,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:04:42,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:42,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:42,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:43,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:43,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:43,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:43,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:43,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361976059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:43,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:43,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 14:04:43,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557831287] [2021-06-05 14:04:43,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:04:43,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:43,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:04:43,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:43,138 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:43,381 INFO L93 Difference]: Finished difference Result 420 states and 1201 transitions. [2021-06-05 14:04:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:04:43,382 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:43,382 INFO L225 Difference]: With dead ends: 420 [2021-06-05 14:04:43,382 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 14:04:43,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 282.0ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:04:43,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 14:04:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 368. [2021-06-05 14:04:43,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-06-05 14:04:43,386 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-06-05 14:04:43,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:43,387 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-06-05 14:04:43,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:43,387 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-06-05 14:04:43,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:43,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:43,387 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:43,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10084,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:43,589 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:43,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:43,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1878793815, now seen corresponding path program 131 times [2021-06-05 14:04:43,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:43,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116998822] [2021-06-05 14:04:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:43,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:43,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116998822] [2021-06-05 14:04:43,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116998822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:43,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311327513] [2021-06-05 14:04:43,646 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 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 14:04:43,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:43,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:43,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:43,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:43,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311327513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:43,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:43,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:43,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223504333] [2021-06-05 14:04:43,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:43,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:43,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:43,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:43,698 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:43,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:43,752 INFO L93 Difference]: Finished difference Result 489 states and 1363 transitions. [2021-06-05 14:04:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:04:43,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:43,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:43,753 INFO L225 Difference]: With dead ends: 489 [2021-06-05 14:04:43,753 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 14:04:43,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 14:04:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 401. [2021-06-05 14:04:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0625) internal successors, (1225), 400 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1225 transitions. [2021-06-05 14:04:43,758 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1225 transitions. Word has length 18 [2021-06-05 14:04:43,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:43,758 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1225 transitions. [2021-06-05 14:04:43,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1225 transitions. [2021-06-05 14:04:43,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:43,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:43,759 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:43,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10193 [2021-06-05 14:04:43,959 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:43,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1909827215, now seen corresponding path program 132 times [2021-06-05 14:04:43,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:43,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563845095] [2021-06-05 14:04:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:43,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:43,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563845095] [2021-06-05 14:04:43,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563845095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:43,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642468114] [2021-06-05 14:04:43,999 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 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 14:04:44,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:44,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:44,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:44,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:44,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642468114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:44,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:44,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:44,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525233486] [2021-06-05 14:04:44,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:44,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:44,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:44,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:44,059 INFO L87 Difference]: Start difference. First operand 401 states and 1225 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:44,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:44,147 INFO L93 Difference]: Finished difference Result 521 states and 1410 transitions. [2021-06-05 14:04:44,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:04:44,148 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:44,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:44,148 INFO L225 Difference]: With dead ends: 521 [2021-06-05 14:04:44,148 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 14:04:44,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:04:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 14:04:44,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 397. [2021-06-05 14:04:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0606060606060606) internal successors, (1212), 396 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1212 transitions. [2021-06-05 14:04:44,153 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1212 transitions. Word has length 18 [2021-06-05 14:04:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:44,153 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1212 transitions. [2021-06-05 14:04:44,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1212 transitions. [2021-06-05 14:04:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:44,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:44,154 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:44,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10194,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:44,355 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:44,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:44,355 INFO L82 PathProgramCache]: Analyzing trace with hash -902005143, now seen corresponding path program 133 times [2021-06-05 14:04:44,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:44,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295400609] [2021-06-05 14:04:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:44,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:44,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295400609] [2021-06-05 14:04:44,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295400609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:44,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704115003] [2021-06-05 14:04:44,407 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 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 14:04:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:44,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:44,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:44,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704115003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:44,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:44,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:44,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426500603] [2021-06-05 14:04:44,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:44,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:44,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:44,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:44,481 INFO L87 Difference]: Start difference. First operand 397 states and 1212 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:44,621 INFO L93 Difference]: Finished difference Result 501 states and 1377 transitions. [2021-06-05 14:04:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:04:44,621 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:44,622 INFO L225 Difference]: With dead ends: 501 [2021-06-05 14:04:44,622 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 14:04:44,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:04:44,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 14:04:44,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 394. [2021-06-05 14:04:44,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:44,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-06-05 14:04:44,628 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-06-05 14:04:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:44,628 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-06-05 14:04:44,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-06-05 14:04:44,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:44,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:44,629 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:44,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10195,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:44,842 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:44,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:44,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2125504975, now seen corresponding path program 134 times [2021-06-05 14:04:44,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:44,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116068742] [2021-06-05 14:04:44,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:44,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:44,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116068742] [2021-06-05 14:04:44,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116068742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:44,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055917394] [2021-06-05 14:04:44,884 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 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 14:04:44,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:44,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:44,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:44,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:44,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055917394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:44,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:44,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:44,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649480602] [2021-06-05 14:04:44,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:44,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:44,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:44,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:44,947 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:45,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:45,068 INFO L93 Difference]: Finished difference Result 512 states and 1422 transitions. [2021-06-05 14:04:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:45,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:45,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:45,069 INFO L225 Difference]: With dead ends: 512 [2021-06-05 14:04:45,069 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 14:04:45,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 14:04:45,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 394. [2021-06-05 14:04:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-06-05 14:04:45,075 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-06-05 14:04:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:45,075 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-06-05 14:04:45,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-06-05 14:04:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:04:45,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:45,076 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:45,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10196,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:45,293 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:45,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1489038121, now seen corresponding path program 135 times [2021-06-05 14:04:45,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:45,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264593088] [2021-06-05 14:04:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:45,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:45,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264593088] [2021-06-05 14:04:45,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264593088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:45,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302804444] [2021-06-05 14:04:45,338 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 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 14:04:45,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:45,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:45,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:04:45,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:45,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302804444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:45,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:45,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:45,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409982093] [2021-06-05 14:04:45,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:45,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:45,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:45,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:45,394 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:45,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:45,513 INFO L93 Difference]: Finished difference Result 594 states and 1635 transitions. [2021-06-05 14:04:45,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:04:45,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:04:45,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:45,514 INFO L225 Difference]: With dead ends: 594 [2021-06-05 14:04:45,514 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 14:04:45,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:04:45,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 14:04:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 403. [2021-06-05 14:04:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.0597014925373136) internal successors, (1230), 402 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1230 transitions. [2021-06-05 14:04:45,519 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1230 transitions. Word has length 18 [2021-06-05 14:04:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:45,519 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1230 transitions. [2021-06-05 14:04:45,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:45,519 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1230 transitions. [2021-06-05 14:04:45,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:45,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:45,519 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:45,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10197,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:45,720 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:45,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:45,720 INFO L82 PathProgramCache]: Analyzing trace with hash 610808602, now seen corresponding path program 136 times [2021-06-05 14:04:45,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:45,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595339823] [2021-06-05 14:04:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:45,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:45,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595339823] [2021-06-05 14:04:45,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595339823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:45,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553742552] [2021-06-05 14:04:45,781 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 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 14:04:45,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:45,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:45,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:45,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:45,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553742552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:45,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:45,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:04:45,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253666063] [2021-06-05 14:04:45,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:45,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:45,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:45,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:45,836 INFO L87 Difference]: Start difference. First operand 403 states and 1230 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:45,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:45,935 INFO L93 Difference]: Finished difference Result 532 states and 1448 transitions. [2021-06-05 14:04:45,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:04:45,935 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:45,936 INFO L225 Difference]: With dead ends: 532 [2021-06-05 14:04:45,936 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 14:04:45,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:04:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 14:04:45,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 415. [2021-06-05 14:04:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.07487922705314) internal successors, (1273), 414 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1273 transitions. [2021-06-05 14:04:45,941 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1273 transitions. Word has length 19 [2021-06-05 14:04:45,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:45,941 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1273 transitions. [2021-06-05 14:04:45,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1273 transitions. [2021-06-05 14:04:45,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:45,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:45,941 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:46,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10198 [2021-06-05 14:04:46,142 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:46,142 INFO L82 PathProgramCache]: Analyzing trace with hash 522898661, now seen corresponding path program 137 times [2021-06-05 14:04:46,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:46,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404200735] [2021-06-05 14:04:46,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:46,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:46,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404200735] [2021-06-05 14:04:46,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404200735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:46,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879176913] [2021-06-05 14:04:46,189 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 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 14:04:46,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:46,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:46,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:46,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879176913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:46,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:46,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:04:46,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773415390] [2021-06-05 14:04:46,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:46,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:46,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:46,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:46,243 INFO L87 Difference]: Start difference. First operand 415 states and 1273 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:46,412 INFO L93 Difference]: Finished difference Result 606 states and 1593 transitions. [2021-06-05 14:04:46,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:04:46,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:46,413 INFO L225 Difference]: With dead ends: 606 [2021-06-05 14:04:46,413 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 14:04:46,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:04:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 14:04:46,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 419. [2021-06-05 14:04:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.0717703349282295) internal successors, (1284), 418 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1284 transitions. [2021-06-05 14:04:46,418 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1284 transitions. Word has length 19 [2021-06-05 14:04:46,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:46,418 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1284 transitions. [2021-06-05 14:04:46,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:46,418 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1284 transitions. [2021-06-05 14:04:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:46,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:46,419 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:46,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10199 [2021-06-05 14:04:46,619 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:46,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:46,620 INFO L82 PathProgramCache]: Analyzing trace with hash -544341384, now seen corresponding path program 138 times [2021-06-05 14:04:46,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:46,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924622523] [2021-06-05 14:04:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:46,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:46,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924622523] [2021-06-05 14:04:46,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924622523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:46,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541708687] [2021-06-05 14:04:46,662 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 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 14:04:46,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:46,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:46,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:46,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:46,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541708687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:46,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:46,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:46,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090370240] [2021-06-05 14:04:46,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:46,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:46,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:46,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:46,715 INFO L87 Difference]: Start difference. First operand 419 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:46,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:46,833 INFO L93 Difference]: Finished difference Result 466 states and 1355 transitions. [2021-06-05 14:04:46,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:46,833 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:46,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:46,834 INFO L225 Difference]: With dead ends: 466 [2021-06-05 14:04:46,834 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 14:04:46,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:46,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 14:04:46,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 421. [2021-06-05 14:04:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.057142857142857) internal successors, (1284), 420 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:46,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1284 transitions. [2021-06-05 14:04:46,838 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1284 transitions. Word has length 19 [2021-06-05 14:04:46,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:46,838 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1284 transitions. [2021-06-05 14:04:46,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:46,838 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1284 transitions. [2021-06-05 14:04:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:46,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:46,839 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:47,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10200 [2021-06-05 14:04:47,039 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:47,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2114601783, now seen corresponding path program 139 times [2021-06-05 14:04:47,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:47,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635080563] [2021-06-05 14:04:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:47,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:47,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635080563] [2021-06-05 14:04:47,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635080563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:47,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501938295] [2021-06-05 14:04:47,082 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 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 14:04:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:47,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:47,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:47,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501938295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:47,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:47,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:47,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514026614] [2021-06-05 14:04:47,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:47,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:47,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:47,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:47,141 INFO L87 Difference]: Start difference. First operand 421 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:47,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:47,199 INFO L93 Difference]: Finished difference Result 597 states and 1562 transitions. [2021-06-05 14:04:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:04:47,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:47,200 INFO L225 Difference]: With dead ends: 597 [2021-06-05 14:04:47,200 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 14:04:47,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 14:04:47,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 407. [2021-06-05 14:04:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0320197044334973) internal successors, (1231), 406 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1231 transitions. [2021-06-05 14:04:47,204 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1231 transitions. Word has length 19 [2021-06-05 14:04:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:47,205 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1231 transitions. [2021-06-05 14:04:47,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1231 transitions. [2021-06-05 14:04:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:47,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:47,205 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:47,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10201 [2021-06-05 14:04:47,406 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1564318246, now seen corresponding path program 140 times [2021-06-05 14:04:47,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:47,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037093303] [2021-06-05 14:04:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:47,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:47,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037093303] [2021-06-05 14:04:47,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037093303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:47,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147062575] [2021-06-05 14:04:47,453 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 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 14:04:47,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:47,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:47,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:47,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:47,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147062575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:47,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:47,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:47,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082889177] [2021-06-05 14:04:47,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:47,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:47,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:47,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:47,522 INFO L87 Difference]: Start difference. First operand 407 states and 1231 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:47,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:47,621 INFO L93 Difference]: Finished difference Result 489 states and 1403 transitions. [2021-06-05 14:04:47,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:04:47,622 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:47,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:47,622 INFO L225 Difference]: With dead ends: 489 [2021-06-05 14:04:47,622 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 14:04:47,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:04:47,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 14:04:47,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 418. [2021-06-05 14:04:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.0239808153477217) internal successors, (1261), 417 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1261 transitions. [2021-06-05 14:04:47,628 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1261 transitions. Word has length 19 [2021-06-05 14:04:47,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:47,628 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1261 transitions. [2021-06-05 14:04:47,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1261 transitions. [2021-06-05 14:04:47,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:47,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:47,629 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:47,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10202,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:47,848 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:47,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:47,849 INFO L82 PathProgramCache]: Analyzing trace with hash 672996615, now seen corresponding path program 141 times [2021-06-05 14:04:47,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:47,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897638317] [2021-06-05 14:04:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:47,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:47,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897638317] [2021-06-05 14:04:47,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897638317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:47,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885678280] [2021-06-05 14:04:47,889 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 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 14:04:47,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:47,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:47,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:47,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:47,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885678280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:47,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:47,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:47,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642279084] [2021-06-05 14:04:47,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:47,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:47,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:47,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:47,947 INFO L87 Difference]: Start difference. First operand 418 states and 1261 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:48,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:48,018 INFO L93 Difference]: Finished difference Result 636 states and 1639 transitions. [2021-06-05 14:04:48,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:04:48,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:48,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:48,019 INFO L225 Difference]: With dead ends: 636 [2021-06-05 14:04:48,019 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 14:04:48,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:48,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 14:04:48,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 405. [2021-06-05 14:04:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.0024752475247523) internal successors, (1213), 404 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1213 transitions. [2021-06-05 14:04:48,023 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1213 transitions. Word has length 19 [2021-06-05 14:04:48,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:48,023 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1213 transitions. [2021-06-05 14:04:48,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1213 transitions. [2021-06-05 14:04:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:48,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:48,024 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:48,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10203 [2021-06-05 14:04:48,225 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1786709960, now seen corresponding path program 142 times [2021-06-05 14:04:48,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:48,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148244118] [2021-06-05 14:04:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:48,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:48,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148244118] [2021-06-05 14:04:48,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148244118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:48,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231063226] [2021-06-05 14:04:48,265 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 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 14:04:48,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:48,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:48,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:48,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:48,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231063226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:48,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:48,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:48,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269124513] [2021-06-05 14:04:48,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:48,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:48,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:48,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:48,319 INFO L87 Difference]: Start difference. First operand 405 states and 1213 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:48,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:48,445 INFO L93 Difference]: Finished difference Result 488 states and 1377 transitions. [2021-06-05 14:04:48,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:48,446 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:48,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:48,446 INFO L225 Difference]: With dead ends: 488 [2021-06-05 14:04:48,446 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 14:04:48,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:04:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 14:04:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 409. [2021-06-05 14:04:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.9901960784313726) internal successors, (1220), 408 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1220 transitions. [2021-06-05 14:04:48,451 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1220 transitions. Word has length 19 [2021-06-05 14:04:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:48,451 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1220 transitions. [2021-06-05 14:04:48,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1220 transitions. [2021-06-05 14:04:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:48,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:48,451 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:48,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10204,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:48,654 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:48,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:48,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1067090633, now seen corresponding path program 143 times [2021-06-05 14:04:48,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:48,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070205575] [2021-06-05 14:04:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:48,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:48,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070205575] [2021-06-05 14:04:48,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070205575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:48,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080008618] [2021-06-05 14:04:48,696 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 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 14:04:48,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:48,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:48,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:48,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:48,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080008618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:48,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:48,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:04:48,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263856727] [2021-06-05 14:04:48,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:48,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:48,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:48,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:48,752 INFO L87 Difference]: Start difference. First operand 409 states and 1220 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:48,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:48,839 INFO L93 Difference]: Finished difference Result 668 states and 1705 transitions. [2021-06-05 14:04:48,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:04:48,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:48,840 INFO L225 Difference]: With dead ends: 668 [2021-06-05 14:04:48,840 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 14:04:48,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:04:48,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 14:04:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 429. [2021-06-05 14:04:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.0163551401869158) internal successors, (1291), 428 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1291 transitions. [2021-06-05 14:04:48,845 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1291 transitions. Word has length 19 [2021-06-05 14:04:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:48,845 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1291 transitions. [2021-06-05 14:04:48,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1291 transitions. [2021-06-05 14:04:48,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:48,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:48,846 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:49,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10205 [2021-06-05 14:04:49,046 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1705598054, now seen corresponding path program 144 times [2021-06-05 14:04:49,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:49,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061183243] [2021-06-05 14:04:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:49,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:49,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061183243] [2021-06-05 14:04:49,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061183243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:49,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838990886] [2021-06-05 14:04:49,099 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 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 14:04:49,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:04:49,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:49,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:49,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:49,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838990886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:49,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:49,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:49,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928069730] [2021-06-05 14:04:49,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:49,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:49,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:49,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:49,162 INFO L87 Difference]: Start difference. First operand 429 states and 1291 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:49,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:49,250 INFO L93 Difference]: Finished difference Result 521 states and 1480 transitions. [2021-06-05 14:04:49,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:04:49,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:49,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:49,251 INFO L225 Difference]: With dead ends: 521 [2021-06-05 14:04:49,251 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 14:04:49,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:04:49,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 14:04:49,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 427. [2021-06-05 14:04:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-06-05 14:04:49,255 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-06-05 14:04:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:49,256 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-06-05 14:04:49,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-06-05 14:04:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:49,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:49,256 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:49,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10206,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:49,457 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:49,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:49,457 INFO L82 PathProgramCache]: Analyzing trace with hash 824779527, now seen corresponding path program 145 times [2021-06-05 14:04:49,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:49,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854266189] [2021-06-05 14:04:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:49,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:49,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854266189] [2021-06-05 14:04:49,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854266189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:49,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471899152] [2021-06-05 14:04:49,499 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 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 14:04:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:49,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:49,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:49,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471899152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:49,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:49,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:49,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066442982] [2021-06-05 14:04:49,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:49,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:49,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:49,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:49,551 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:49,672 INFO L93 Difference]: Finished difference Result 690 states and 1758 transitions. [2021-06-05 14:04:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:49,673 INFO L225 Difference]: With dead ends: 690 [2021-06-05 14:04:49,673 INFO L226 Difference]: Without dead ends: 690 [2021-06-05 14:04:49,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-06-05 14:04:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 427. [2021-06-05 14:04:49,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-06-05 14:04:49,678 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-06-05 14:04:49,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:49,678 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-06-05 14:04:49,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-06-05 14:04:49,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:49,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:49,679 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:49,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10207 [2021-06-05 14:04:49,879 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:49,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:49,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1044035814, now seen corresponding path program 146 times [2021-06-05 14:04:49,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:49,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917903057] [2021-06-05 14:04:49,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:49,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:49,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917903057] [2021-06-05 14:04:49,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917903057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:49,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331904258] [2021-06-05 14:04:49,906 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 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 14:04:49,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:49,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:49,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:49,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:04:49,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331904258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:49,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:49,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:04:49,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078411220] [2021-06-05 14:04:49,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:04:49,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:49,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:04:49,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:04:49,958 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 14:04:50,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:50,006 INFO L93 Difference]: Finished difference Result 587 states and 1642 transitions. [2021-06-05 14:04:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:04:50,007 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:50,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:50,007 INFO L225 Difference]: With dead ends: 587 [2021-06-05 14:04:50,007 INFO L226 Difference]: Without dead ends: 587 [2021-06-05 14:04:50,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-05 14:04:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 451. [2021-06-05 14:04:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.0644444444444443) internal successors, (1379), 450 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1379 transitions. [2021-06-05 14:04:50,014 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1379 transitions. Word has length 19 [2021-06-05 14:04:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:50,014 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1379 transitions. [2021-06-05 14:04:50,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 14:04:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1379 transitions. [2021-06-05 14:04:50,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:50,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:50,015 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:50,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10208,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:50,229 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:50,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1821185413, now seen corresponding path program 147 times [2021-06-05 14:04:50,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:50,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041509936] [2021-06-05 14:04:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:50,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:50,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041509936] [2021-06-05 14:04:50,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041509936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:50,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350442928] [2021-06-05 14:04:50,258 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 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 14:04:50,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:50,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:50,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:50,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:04:50,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350442928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:50,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:50,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:04:50,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670519719] [2021-06-05 14:04:50,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:04:50,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:50,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:04:50,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:04:50,307 INFO L87 Difference]: Start difference. First operand 451 states and 1379 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 14:04:50,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:50,385 INFO L93 Difference]: Finished difference Result 581 states and 1594 transitions. [2021-06-05 14:04:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:04:50,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:50,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:50,386 INFO L225 Difference]: With dead ends: 581 [2021-06-05 14:04:50,386 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 14:04:50,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:50,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 14:04:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 466. [2021-06-05 14:04:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0709677419354837) internal successors, (1428), 465 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1428 transitions. [2021-06-05 14:04:50,391 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1428 transitions. Word has length 19 [2021-06-05 14:04:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:50,391 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1428 transitions. [2021-06-05 14:04:50,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 14:04:50,391 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1428 transitions. [2021-06-05 14:04:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:50,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:50,392 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:50,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10209 [2021-06-05 14:04:50,593 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:50,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:50,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2123535389, now seen corresponding path program 148 times [2021-06-05 14:04:50,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:50,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812040968] [2021-06-05 14:04:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:50,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:50,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812040968] [2021-06-05 14:04:50,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812040968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:50,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100232188] [2021-06-05 14:04:50,624 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 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 14:04:50,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:50,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:50,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:50,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:50,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100232188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:50,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:50,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:04:50,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869880607] [2021-06-05 14:04:50,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:04:50,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:50,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:04:50,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:50,675 INFO L87 Difference]: Start difference. First operand 466 states and 1428 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:50,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:50,727 INFO L93 Difference]: Finished difference Result 595 states and 1618 transitions. [2021-06-05 14:04:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:04:50,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:04:50,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:50,728 INFO L225 Difference]: With dead ends: 595 [2021-06-05 14:04:50,728 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 14:04:50,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 14:04:50,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 465. [2021-06-05 14:04:50,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-06-05 14:04:50,733 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-06-05 14:04:50,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:50,733 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-06-05 14:04:50,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:50,733 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-06-05 14:04:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:50,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:50,734 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:50,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10210,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:50,935 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:50,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:50,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1633576329, now seen corresponding path program 149 times [2021-06-05 14:04:50,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:50,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437228829] [2021-06-05 14:04:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:50,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:50,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437228829] [2021-06-05 14:04:50,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437228829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:50,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832294949] [2021-06-05 14:04:50,970 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 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 14:04:50,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:04:50,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:50,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:50,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:51,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832294949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:51,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:51,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:51,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467202180] [2021-06-05 14:04:51,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:51,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:51,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:51,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:51,027 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:51,105 INFO L93 Difference]: Finished difference Result 631 states and 1678 transitions. [2021-06-05 14:04:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:04:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-06-05 14:04:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:51,106 INFO L225 Difference]: With dead ends: 631 [2021-06-05 14:04:51,106 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 14:04:51,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:04:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 14:04:51,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 465. [2021-06-05 14:04:51,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:51,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-06-05 14:04:51,111 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-06-05 14:04:51,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:51,111 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-06-05 14:04:51,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:51,111 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-06-05 14:04:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:51,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:51,111 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:51,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10211 [2021-06-05 14:04:51,312 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:51,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:51,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1259104068, now seen corresponding path program 150 times [2021-06-05 14:04:51,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:51,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453442977] [2021-06-05 14:04:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:51,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:51,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453442977] [2021-06-05 14:04:51,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453442977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:51,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981561708] [2021-06-05 14:04:51,356 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 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 14:04:51,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:51,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:51,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:51,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:51,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981561708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:51,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:51,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:51,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473976329] [2021-06-05 14:04:51,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:51,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:51,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:51,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:51,406 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:51,516 INFO L93 Difference]: Finished difference Result 578 states and 1659 transitions. [2021-06-05 14:04:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:51,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:51,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:51,517 INFO L225 Difference]: With dead ends: 578 [2021-06-05 14:04:51,517 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 14:04:51,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:04:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 14:04:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 469. [2021-06-05 14:04:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-06-05 14:04:51,522 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-06-05 14:04:51,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:51,522 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-06-05 14:04:51,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:51,522 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-06-05 14:04:51,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:51,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:51,523 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:51,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10212 [2021-06-05 14:04:51,723 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:51,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:51,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2139922595, now seen corresponding path program 151 times [2021-06-05 14:04:51,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:51,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248832342] [2021-06-05 14:04:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:51,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:51,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248832342] [2021-06-05 14:04:51,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248832342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:51,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626828135] [2021-06-05 14:04:51,764 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 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 14:04:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:51,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:51,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:51,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626828135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:51,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:51,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:51,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635059442] [2021-06-05 14:04:51,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:51,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:51,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:51,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:51,813 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:51,941 INFO L93 Difference]: Finished difference Result 678 states and 1771 transitions. [2021-06-05 14:04:51,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:04:51,941 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:51,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:51,942 INFO L225 Difference]: With dead ends: 678 [2021-06-05 14:04:51,942 INFO L226 Difference]: Without dead ends: 678 [2021-06-05 14:04:51,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-05 14:04:51,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 469. [2021-06-05 14:04:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-06-05 14:04:51,947 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-06-05 14:04:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:51,948 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-06-05 14:04:51,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-06-05 14:04:51,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:51,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:51,948 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:52,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10213 [2021-06-05 14:04:52,149 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1702003208, now seen corresponding path program 152 times [2021-06-05 14:04:52,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:52,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648235864] [2021-06-05 14:04:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:52,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:52,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648235864] [2021-06-05 14:04:52,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648235864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:52,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615161374] [2021-06-05 14:04:52,195 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 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 14:04:52,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:52,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:52,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:52,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:52,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615161374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:52,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:52,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:04:52,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519419080] [2021-06-05 14:04:52,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:52,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:52,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:52,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:52,263 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:52,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:52,363 INFO L93 Difference]: Finished difference Result 606 states and 1712 transitions. [2021-06-05 14:04:52,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:04:52,364 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:52,364 INFO L225 Difference]: With dead ends: 606 [2021-06-05 14:04:52,364 INFO L226 Difference]: Without dead ends: 596 [2021-06-05 14:04:52,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:04:52,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-06-05 14:04:52,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 477. [2021-06-05 14:04:52,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.03781512605042) internal successors, (1446), 476 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:52,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1446 transitions. [2021-06-05 14:04:52,370 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1446 transitions. Word has length 19 [2021-06-05 14:04:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:52,370 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1446 transitions. [2021-06-05 14:04:52,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1446 transitions. [2021-06-05 14:04:52,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:52,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:52,370 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:52,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10214,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:52,571 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:52,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:52,571 INFO L82 PathProgramCache]: Analyzing trace with hash -656787657, now seen corresponding path program 153 times [2021-06-05 14:04:52,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:52,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015679316] [2021-06-05 14:04:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:52,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:52,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015679316] [2021-06-05 14:04:52,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015679316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:52,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608571807] [2021-06-05 14:04:52,615 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 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 14:04:52,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:52,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:52,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:52,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:52,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608571807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:52,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:52,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:04:52,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204512919] [2021-06-05 14:04:52,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:52,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:52,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:52,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:52,673 INFO L87 Difference]: Start difference. First operand 477 states and 1446 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:52,845 INFO L93 Difference]: Finished difference Result 741 states and 1915 transitions. [2021-06-05 14:04:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:04:52,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:52,846 INFO L225 Difference]: With dead ends: 741 [2021-06-05 14:04:52,846 INFO L226 Difference]: Without dead ends: 741 [2021-06-05 14:04:52,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:04:52,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-06-05 14:04:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 466. [2021-06-05 14:04:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0279569892473117) internal successors, (1408), 465 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1408 transitions. [2021-06-05 14:04:52,851 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1408 transitions. Word has length 19 [2021-06-05 14:04:52,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:52,851 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1408 transitions. [2021-06-05 14:04:52,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:52,851 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1408 transitions. [2021-06-05 14:04:52,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:52,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:52,852 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:53,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10215 [2021-06-05 14:04:53,053 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:53,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:53,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1539478916, now seen corresponding path program 154 times [2021-06-05 14:04:53,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:53,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428702120] [2021-06-05 14:04:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:53,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:53,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428702120] [2021-06-05 14:04:53,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428702120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:53,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027944777] [2021-06-05 14:04:53,095 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 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 14:04:53,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:53,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:53,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:53,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:53,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027944777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:53,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:53,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:04:53,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004068125] [2021-06-05 14:04:53,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:04:53,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:53,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:04:53,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:53,146 INFO L87 Difference]: Start difference. First operand 466 states and 1408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:53,202 INFO L93 Difference]: Finished difference Result 658 states and 1841 transitions. [2021-06-05 14:04:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:04:53,202 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:04:53,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:53,203 INFO L225 Difference]: With dead ends: 658 [2021-06-05 14:04:53,203 INFO L226 Difference]: Without dead ends: 658 [2021-06-05 14:04:53,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:53,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-06-05 14:04:53,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 506. [2021-06-05 14:04:53,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.091089108910891) internal successors, (1561), 505 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1561 transitions. [2021-06-05 14:04:53,209 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1561 transitions. Word has length 19 [2021-06-05 14:04:53,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:53,209 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1561 transitions. [2021-06-05 14:04:53,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1561 transitions. [2021-06-05 14:04:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:53,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:53,209 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:53,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10216,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:53,410 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash 762329317, now seen corresponding path program 155 times [2021-06-05 14:04:53,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:53,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187391952] [2021-06-05 14:04:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:53,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:53,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187391952] [2021-06-05 14:04:53,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187391952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:53,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421407669] [2021-06-05 14:04:53,446 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 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 14:04:53,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:53,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:53,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:53,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:53,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421407669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:53,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:53,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:04:53,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617785590] [2021-06-05 14:04:53,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:04:53,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:53,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:04:53,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:53,493 INFO L87 Difference]: Start difference. First operand 506 states and 1561 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:53,584 INFO L93 Difference]: Finished difference Result 668 states and 1844 transitions. [2021-06-05 14:04:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:04:53,585 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:04:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:53,586 INFO L225 Difference]: With dead ends: 668 [2021-06-05 14:04:53,586 INFO L226 Difference]: Without dead ends: 666 [2021-06-05 14:04:53,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:04:53,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-05 14:04:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 524. [2021-06-05 14:04:53,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.108986615678776) internal successors, (1626), 523 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1626 transitions. [2021-06-05 14:04:53,591 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1626 transitions. Word has length 19 [2021-06-05 14:04:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:53,591 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1626 transitions. [2021-06-05 14:04:53,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:53,591 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1626 transitions. [2021-06-05 14:04:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:53,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:53,592 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:53,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10217 [2021-06-05 14:04:53,792 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:53,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:53,793 INFO L82 PathProgramCache]: Analyzing trace with hash -186000542, now seen corresponding path program 156 times [2021-06-05 14:04:53,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:53,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378753973] [2021-06-05 14:04:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:53,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:53,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378753973] [2021-06-05 14:04:53,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378753973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:53,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669431565] [2021-06-05 14:04:53,827 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 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 14:04:53,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:04:53,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:53,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:53,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:53,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669431565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:53,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:53,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:04:53,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653918252] [2021-06-05 14:04:53,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:04:53,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:53,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:04:53,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:53,878 INFO L87 Difference]: Start difference. First operand 524 states and 1626 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:53,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:53,959 INFO L93 Difference]: Finished difference Result 664 states and 1886 transitions. [2021-06-05 14:04:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:04:53,960 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:04:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:53,960 INFO L225 Difference]: With dead ends: 664 [2021-06-05 14:04:53,961 INFO L226 Difference]: Without dead ends: 662 [2021-06-05 14:04:53,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:04:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-05 14:04:53,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 524. [2021-06-05 14:04:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.107074569789675) internal successors, (1625), 523 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:53,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1625 transitions. [2021-06-05 14:04:53,967 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1625 transitions. Word has length 19 [2021-06-05 14:04:53,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:53,967 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1625 transitions. [2021-06-05 14:04:53,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1625 transitions. [2021-06-05 14:04:53,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:53,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:53,967 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:54,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10218,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:54,168 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:54,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:54,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1822024671, now seen corresponding path program 157 times [2021-06-05 14:04:54,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:54,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661952411] [2021-06-05 14:04:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:54,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:54,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661952411] [2021-06-05 14:04:54,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661952411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:54,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183202893] [2021-06-05 14:04:54,200 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 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 14:04:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:54,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:54,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:54,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183202893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:54,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:54,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:04:54,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227656679] [2021-06-05 14:04:54,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:04:54,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:54,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:04:54,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:04:54,250 INFO L87 Difference]: Start difference. First operand 524 states and 1625 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:54,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:54,299 INFO L93 Difference]: Finished difference Result 657 states and 1827 transitions. [2021-06-05 14:04:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:04:54,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:04:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:54,300 INFO L225 Difference]: With dead ends: 657 [2021-06-05 14:04:54,300 INFO L226 Difference]: Without dead ends: 657 [2021-06-05 14:04:54,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:54,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-05 14:04:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 524. [2021-06-05 14:04:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1032504780114722) internal successors, (1623), 523 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1623 transitions. [2021-06-05 14:04:54,308 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1623 transitions. Word has length 19 [2021-06-05 14:04:54,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:54,308 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1623 transitions. [2021-06-05 14:04:54,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:54,308 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1623 transitions. [2021-06-05 14:04:54,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:54,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:54,309 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:54,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10219 [2021-06-05 14:04:54,528 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:54,528 INFO L82 PathProgramCache]: Analyzing trace with hash 949938401, now seen corresponding path program 158 times [2021-06-05 14:04:54,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:54,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632060190] [2021-06-05 14:04:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:54,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:54,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632060190] [2021-06-05 14:04:54,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632060190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:54,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522920462] [2021-06-05 14:04:54,563 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 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 14:04:54,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:54,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:54,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:54,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:54,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522920462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:54,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:54,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:54,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148359624] [2021-06-05 14:04:54,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:54,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:54,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:54,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:54,614 INFO L87 Difference]: Start difference. First operand 524 states and 1623 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:54,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:54,679 INFO L93 Difference]: Finished difference Result 654 states and 1817 transitions. [2021-06-05 14:04:54,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:04:54,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-06-05 14:04:54,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:54,680 INFO L225 Difference]: With dead ends: 654 [2021-06-05 14:04:54,680 INFO L226 Difference]: Without dead ends: 654 [2021-06-05 14:04:54,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:04:54,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-05 14:04:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 521. [2021-06-05 14:04:54,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.098076923076923) internal successors, (1611), 520 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:54,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1611 transitions. [2021-06-05 14:04:54,685 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1611 transitions. Word has length 19 [2021-06-05 14:04:54,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:54,686 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1611 transitions. [2021-06-05 14:04:54,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:54,686 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1611 transitions. [2021-06-05 14:04:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:54,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:54,686 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:54,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10220,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:54,887 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:54,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:54,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1324410662, now seen corresponding path program 159 times [2021-06-05 14:04:54,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:54,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574587270] [2021-06-05 14:04:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:54,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:54,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574587270] [2021-06-05 14:04:54,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574587270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:54,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894059047] [2021-06-05 14:04:54,928 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 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 14:04:54,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:54,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:54,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:54,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:54,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894059047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:54,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:54,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:54,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734846456] [2021-06-05 14:04:54,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:54,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:54,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:54,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:54,977 INFO L87 Difference]: Start difference. First operand 521 states and 1611 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:55,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:55,086 INFO L93 Difference]: Finished difference Result 678 states and 1970 transitions. [2021-06-05 14:04:55,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:04:55,087 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:55,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:55,088 INFO L225 Difference]: With dead ends: 678 [2021-06-05 14:04:55,088 INFO L226 Difference]: Without dead ends: 670 [2021-06-05 14:04:55,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:04:55,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-05 14:04:55,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 544. [2021-06-05 14:04:55,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.1270718232044197) internal successors, (1698), 543 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:55,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1698 transitions. [2021-06-05 14:04:55,093 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1698 transitions. Word has length 19 [2021-06-05 14:04:55,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:55,094 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1698 transitions. [2021-06-05 14:04:55,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:55,094 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1698 transitions. [2021-06-05 14:04:55,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:55,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:55,094 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:55,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10221 [2021-06-05 14:04:55,295 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:55,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:55,295 INFO L82 PathProgramCache]: Analyzing trace with hash 443592135, now seen corresponding path program 160 times [2021-06-05 14:04:55,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:55,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257524490] [2021-06-05 14:04:55,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:55,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:55,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257524490] [2021-06-05 14:04:55,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257524490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:55,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113421286] [2021-06-05 14:04:55,334 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 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 14:04:55,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:55,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:55,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113421286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:55,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:55,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:55,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595953126] [2021-06-05 14:04:55,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:55,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:55,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:55,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:55,400 INFO L87 Difference]: Start difference. First operand 544 states and 1698 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:55,513 INFO L93 Difference]: Finished difference Result 717 states and 1973 transitions. [2021-06-05 14:04:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:04:55,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:55,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:55,515 INFO L225 Difference]: With dead ends: 717 [2021-06-05 14:04:55,515 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 14:04:55,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 14:04:55,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 548. [2021-06-05 14:04:55,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.126142595978062) internal successors, (1710), 547 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1710 transitions. [2021-06-05 14:04:55,520 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1710 transitions. Word has length 19 [2021-06-05 14:04:55,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:55,520 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1710 transitions. [2021-06-05 14:04:55,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:55,520 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1710 transitions. [2021-06-05 14:04:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:55,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:55,521 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:55,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10222 [2021-06-05 14:04:55,722 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:55,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:55,722 INFO L82 PathProgramCache]: Analyzing trace with hash 881511522, now seen corresponding path program 161 times [2021-06-05 14:04:55,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:55,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491586502] [2021-06-05 14:04:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:55,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:55,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491586502] [2021-06-05 14:04:55,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491586502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:55,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24833554] [2021-06-05 14:04:55,767 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 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 14:04:55,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:55,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:55,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:55,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:55,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24833554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:55,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:55,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:04:55,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153340070] [2021-06-05 14:04:55,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:55,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:55,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:55,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:55,875 INFO L87 Difference]: Start difference. First operand 548 states and 1710 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:55,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:55,987 INFO L93 Difference]: Finished difference Result 704 states and 2024 transitions. [2021-06-05 14:04:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:55,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:55,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:55,989 INFO L225 Difference]: With dead ends: 704 [2021-06-05 14:04:55,989 INFO L226 Difference]: Without dead ends: 694 [2021-06-05 14:04:55,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-05 14:04:55,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 548. [2021-06-05 14:04:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.1243144424131626) internal successors, (1709), 547 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1709 transitions. [2021-06-05 14:04:55,994 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1709 transitions. Word has length 19 [2021-06-05 14:04:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:55,995 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1709 transitions. [2021-06-05 14:04:55,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:55,995 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1709 transitions. [2021-06-05 14:04:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:55,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:55,995 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:56,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10223 [2021-06-05 14:04:56,197 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:56,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:56,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1926727073, now seen corresponding path program 162 times [2021-06-05 14:04:56,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:56,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251451740] [2021-06-05 14:04:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:56,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:56,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251451740] [2021-06-05 14:04:56,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251451740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:56,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028472464] [2021-06-05 14:04:56,237 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 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 14:04:56,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:04:56,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:56,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:56,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:56,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028472464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:56,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:56,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:04:56,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025439354] [2021-06-05 14:04:56,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:56,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:56,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:56,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:56,296 INFO L87 Difference]: Start difference. First operand 548 states and 1709 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:56,469 INFO L93 Difference]: Finished difference Result 763 states and 2067 transitions. [2021-06-05 14:04:56,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:56,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:56,470 INFO L225 Difference]: With dead ends: 763 [2021-06-05 14:04:56,470 INFO L226 Difference]: Without dead ends: 763 [2021-06-05 14:04:56,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:04:56,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-06-05 14:04:56,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 531. [2021-06-05 14:04:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1245283018867926) internal successors, (1656), 530 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1656 transitions. [2021-06-05 14:04:56,476 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1656 transitions. Word has length 19 [2021-06-05 14:04:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:56,476 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1656 transitions. [2021-06-05 14:04:56,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1656 transitions. [2021-06-05 14:04:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:56,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:56,476 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:56,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10224 [2021-06-05 14:04:56,677 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:56,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:56,677 INFO L82 PathProgramCache]: Analyzing trace with hash 36540070, now seen corresponding path program 163 times [2021-06-05 14:04:56,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:56,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450732868] [2021-06-05 14:04:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:56,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:56,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450732868] [2021-06-05 14:04:56,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450732868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:56,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467128390] [2021-06-05 14:04:56,726 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 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 14:04:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:56,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:56,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:56,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467128390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:56,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:56,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:04:56,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508778595] [2021-06-05 14:04:56,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:56,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:56,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:56,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:56,778 INFO L87 Difference]: Start difference. First operand 531 states and 1656 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:56,833 INFO L93 Difference]: Finished difference Result 610 states and 1818 transitions. [2021-06-05 14:04:56,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:04:56,833 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:56,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:56,834 INFO L225 Difference]: With dead ends: 610 [2021-06-05 14:04:56,834 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 14:04:56,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:04:56,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 14:04:56,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 531. [2021-06-05 14:04:56,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1226415094339623) internal successors, (1655), 530 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1655 transitions. [2021-06-05 14:04:56,839 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1655 transitions. Word has length 19 [2021-06-05 14:04:56,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:56,839 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1655 transitions. [2021-06-05 14:04:56,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:56,839 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1655 transitions. [2021-06-05 14:04:56,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:56,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:56,840 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:57,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10225,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:57,041 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash 659269895, now seen corresponding path program 164 times [2021-06-05 14:04:57,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:57,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925449038] [2021-06-05 14:04:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:57,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:57,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925449038] [2021-06-05 14:04:57,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925449038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:57,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736608621] [2021-06-05 14:04:57,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:04:57,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:57,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:57,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:57,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:57,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736608621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:57,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:57,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:04:57,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317181631] [2021-06-05 14:04:57,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:57,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:57,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:57,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:57,141 INFO L87 Difference]: Start difference. First operand 531 states and 1655 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:57,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:57,329 INFO L93 Difference]: Finished difference Result 855 states and 2351 transitions. [2021-06-05 14:04:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:04:57,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:04:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:57,330 INFO L225 Difference]: With dead ends: 855 [2021-06-05 14:04:57,330 INFO L226 Difference]: Without dead ends: 855 [2021-06-05 14:04:57,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:04:57,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-06-05 14:04:57,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 577. [2021-06-05 14:04:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.1180555555555554) internal successors, (1796), 576 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1796 transitions. [2021-06-05 14:04:57,337 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1796 transitions. Word has length 19 [2021-06-05 14:04:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:57,337 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1796 transitions. [2021-06-05 14:04:57,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1796 transitions. [2021-06-05 14:04:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:57,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:57,338 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:57,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10226 [2021-06-05 14:04:57,538 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:57,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:57,538 INFO L82 PathProgramCache]: Analyzing trace with hash 24056922, now seen corresponding path program 165 times [2021-06-05 14:04:57,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:57,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123247845] [2021-06-05 14:04:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:57,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:57,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123247845] [2021-06-05 14:04:57,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123247845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:57,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871072187] [2021-06-05 14:04:57,576 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 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 14:04:57,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:57,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:57,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:57,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:57,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871072187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:57,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:57,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:57,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311188769] [2021-06-05 14:04:57,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:57,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:57,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:57,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:57,630 INFO L87 Difference]: Start difference. First operand 577 states and 1796 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:57,691 INFO L93 Difference]: Finished difference Result 817 states and 2337 transitions. [2021-06-05 14:04:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:04:57,691 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-06-05 14:04:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:57,692 INFO L225 Difference]: With dead ends: 817 [2021-06-05 14:04:57,692 INFO L226 Difference]: Without dead ends: 817 [2021-06-05 14:04:57,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:57,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-06-05 14:04:57,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 632. [2021-06-05 14:04:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.172741679873217) internal successors, (2002), 631 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2002 transitions. [2021-06-05 14:04:57,703 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2002 transitions. Word has length 19 [2021-06-05 14:04:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:57,703 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2002 transitions. [2021-06-05 14:04:57,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2002 transitions. [2021-06-05 14:04:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:57,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:57,704 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:57,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10227,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:57,926 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:57,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:57,926 INFO L82 PathProgramCache]: Analyzing trace with hash -753092677, now seen corresponding path program 166 times [2021-06-05 14:04:57,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:57,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009835244] [2021-06-05 14:04:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:57,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:57,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009835244] [2021-06-05 14:04:57,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009835244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:57,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165668232] [2021-06-05 14:04:57,961 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 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 14:04:57,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:57,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:57,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:57,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:58,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165668232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:58,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:58,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:58,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449734933] [2021-06-05 14:04:58,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:58,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:58,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:58,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:58,017 INFO L87 Difference]: Start difference. First operand 632 states and 2002 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:58,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:58,131 INFO L93 Difference]: Finished difference Result 820 states and 2329 transitions. [2021-06-05 14:04:58,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:58,131 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-06-05 14:04:58,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:58,132 INFO L225 Difference]: With dead ends: 820 [2021-06-05 14:04:58,132 INFO L226 Difference]: Without dead ends: 818 [2021-06-05 14:04:58,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:04:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-06-05 14:04:58,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 649. [2021-06-05 14:04:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 3.1882716049382718) internal successors, (2066), 648 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2066 transitions. [2021-06-05 14:04:58,139 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2066 transitions. Word has length 19 [2021-06-05 14:04:58,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:58,139 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 2066 transitions. [2021-06-05 14:04:58,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:58,139 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2066 transitions. [2021-06-05 14:04:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:58,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:58,140 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:58,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10228,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:58,341 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:58,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:58,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1701422536, now seen corresponding path program 167 times [2021-06-05 14:04:58,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:58,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162845081] [2021-06-05 14:04:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:58,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:58,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162845081] [2021-06-05 14:04:58,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162845081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:58,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409393586] [2021-06-05 14:04:58,376 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 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 14:04:58,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:04:58,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:58,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:58,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:58,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409393586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:58,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:58,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:58,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058866392] [2021-06-05 14:04:58,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:58,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:58,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:58,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:58,425 INFO L87 Difference]: Start difference. First operand 649 states and 2066 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:58,527 INFO L93 Difference]: Finished difference Result 822 states and 2381 transitions. [2021-06-05 14:04:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:58,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-06-05 14:04:58,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:58,528 INFO L225 Difference]: With dead ends: 822 [2021-06-05 14:04:58,528 INFO L226 Difference]: Without dead ends: 820 [2021-06-05 14:04:58,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:04:58,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-05 14:04:58,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 629. [2021-06-05 14:04:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.1640127388535033) internal successors, (1987), 628 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:58,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1987 transitions. [2021-06-05 14:04:58,535 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1987 transitions. Word has length 19 [2021-06-05 14:04:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:58,535 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1987 transitions. [2021-06-05 14:04:58,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:58,535 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1987 transitions. [2021-06-05 14:04:58,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:58,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:58,536 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:58,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10229,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:58,737 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:58,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:58,737 INFO L82 PathProgramCache]: Analyzing trace with hash 957520631, now seen corresponding path program 168 times [2021-06-05 14:04:58,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:58,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812294208] [2021-06-05 14:04:58,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:58,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:58,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812294208] [2021-06-05 14:04:58,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812294208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:58,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611540946] [2021-06-05 14:04:58,772 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 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 14:04:58,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:04:58,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:58,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:58,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:58,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611540946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:58,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:58,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:58,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588396873] [2021-06-05 14:04:58,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:58,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:58,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:58,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:58,825 INFO L87 Difference]: Start difference. First operand 629 states and 1987 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:58,887 INFO L93 Difference]: Finished difference Result 797 states and 2254 transitions. [2021-06-05 14:04:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:04:58,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-06-05 14:04:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:58,888 INFO L225 Difference]: With dead ends: 797 [2021-06-05 14:04:58,888 INFO L226 Difference]: Without dead ends: 797 [2021-06-05 14:04:58,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:58,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-06-05 14:04:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 610. [2021-06-05 14:04:58,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.147783251231527) internal successors, (1917), 609 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1917 transitions. [2021-06-05 14:04:58,895 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1917 transitions. Word has length 19 [2021-06-05 14:04:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:58,895 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1917 transitions. [2021-06-05 14:04:58,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1917 transitions. [2021-06-05 14:04:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:58,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:58,896 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:59,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10230,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:59,097 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:59,097 INFO L82 PathProgramCache]: Analyzing trace with hash -212017540, now seen corresponding path program 169 times [2021-06-05 14:04:59,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:59,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087916158] [2021-06-05 14:04:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:59,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:59,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087916158] [2021-06-05 14:04:59,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087916158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:59,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618854456] [2021-06-05 14:04:59,132 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 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 14:04:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:59,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:59,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:59,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618854456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:59,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:59,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:59,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12770665] [2021-06-05 14:04:59,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:59,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:59,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:59,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:59,178 INFO L87 Difference]: Start difference. First operand 610 states and 1917 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:59,272 INFO L93 Difference]: Finished difference Result 795 states and 2316 transitions. [2021-06-05 14:04:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:04:59,272 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-06-05 14:04:59,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:59,273 INFO L225 Difference]: With dead ends: 795 [2021-06-05 14:04:59,273 INFO L226 Difference]: Without dead ends: 791 [2021-06-05 14:04:59,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:04:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-06-05 14:04:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 610. [2021-06-05 14:04:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.1461412151067325) internal successors, (1916), 609 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:59,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1916 transitions. [2021-06-05 14:04:59,280 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1916 transitions. Word has length 19 [2021-06-05 14:04:59,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:59,280 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1916 transitions. [2021-06-05 14:04:59,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:59,280 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1916 transitions. [2021-06-05 14:04:59,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:59,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:59,281 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:59,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10231 [2021-06-05 14:04:59,481 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:59,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1103339171, now seen corresponding path program 170 times [2021-06-05 14:04:59,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:59,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639098301] [2021-06-05 14:04:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:59,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:59,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639098301] [2021-06-05 14:04:59,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639098301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:59,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188234463] [2021-06-05 14:04:59,515 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 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 14:04:59,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:59,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:59,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:59,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:59,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188234463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:59,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:59,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:59,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383851148] [2021-06-05 14:04:59,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:59,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:59,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:59,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:59,565 INFO L87 Difference]: Start difference. First operand 610 states and 1916 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:59,624 INFO L93 Difference]: Finished difference Result 759 states and 2167 transitions. [2021-06-05 14:04:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:04:59,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 19 [2021-06-05 14:04:59,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:59,626 INFO L225 Difference]: With dead ends: 759 [2021-06-05 14:04:59,626 INFO L226 Difference]: Without dead ends: 759 [2021-06-05 14:04:59,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:59,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-05 14:04:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 557. [2021-06-05 14:04:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.134892086330935) internal successors, (1743), 556 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1743 transitions. [2021-06-05 14:04:59,632 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1743 transitions. Word has length 19 [2021-06-05 14:04:59,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:59,632 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1743 transitions. [2021-06-05 14:04:59,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:04:59,632 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1743 transitions. [2021-06-05 14:04:59,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:59,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:59,633 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:59,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10232 [2021-06-05 14:04:59,833 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:59,834 INFO L82 PathProgramCache]: Analyzing trace with hash -191011332, now seen corresponding path program 171 times [2021-06-05 14:04:59,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:59,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646733956] [2021-06-05 14:04:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:59,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:59,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646733956] [2021-06-05 14:04:59,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646733956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:59,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934652435] [2021-06-05 14:04:59,874 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 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 14:04:59,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:04:59,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:59,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:59,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:59,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934652435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:59,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:59,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:59,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12730055] [2021-06-05 14:04:59,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:59,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:59,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:59,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:59,922 INFO L87 Difference]: Start difference. First operand 557 states and 1743 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:00,027 INFO L93 Difference]: Finished difference Result 713 states and 2090 transitions. [2021-06-05 14:05:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:05:00,027 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:05:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:00,028 INFO L225 Difference]: With dead ends: 713 [2021-06-05 14:05:00,028 INFO L226 Difference]: Without dead ends: 705 [2021-06-05 14:05:00,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:05:00,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-06-05 14:05:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 580. [2021-06-05 14:05:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 3.153713298791019) internal successors, (1826), 579 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1826 transitions. [2021-06-05 14:05:00,035 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1826 transitions. Word has length 19 [2021-06-05 14:05:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:00,035 INFO L482 AbstractCegarLoop]: Abstraction has 580 states and 1826 transitions. [2021-06-05 14:05:00,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:00,035 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1826 transitions. [2021-06-05 14:05:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:00,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:00,036 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:00,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10233 [2021-06-05 14:05:00,236 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:00,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:00,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1071829859, now seen corresponding path program 172 times [2021-06-05 14:05:00,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:00,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934881970] [2021-06-05 14:05:00,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:00,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:00,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934881970] [2021-06-05 14:05:00,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934881970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:00,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014508892] [2021-06-05 14:05:00,277 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 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 14:05:00,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:00,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:00,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:00,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:00,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014508892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:00,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:00,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:05:00,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806793335] [2021-06-05 14:05:00,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:05:00,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:00,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:05:00,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:05:00,328 INFO L87 Difference]: Start difference. First operand 580 states and 1826 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:00,416 INFO L93 Difference]: Finished difference Result 748 states and 2153 transitions. [2021-06-05 14:05:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:05:00,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:05:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:00,417 INFO L225 Difference]: With dead ends: 748 [2021-06-05 14:05:00,417 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 14:05:00,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:05:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 14:05:00,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 605. [2021-06-05 14:05:00,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1506622516556293) internal successors, (1903), 604 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1903 transitions. [2021-06-05 14:05:00,423 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1903 transitions. Word has length 19 [2021-06-05 14:05:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:00,423 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1903 transitions. [2021-06-05 14:05:00,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1903 transitions. [2021-06-05 14:05:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:00,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:00,424 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:00,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10234 [2021-06-05 14:05:00,624 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:00,625 INFO L82 PathProgramCache]: Analyzing trace with hash -633910472, now seen corresponding path program 173 times [2021-06-05 14:05:00,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:00,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875417203] [2021-06-05 14:05:00,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:00,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:00,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875417203] [2021-06-05 14:05:00,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875417203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:00,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505868103] [2021-06-05 14:05:00,669 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 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 14:05:00,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:05:00,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:00,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:00,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:00,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505868103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:00,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:00,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:00,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059251510] [2021-06-05 14:05:00,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:00,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:00,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:00,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:00,723 INFO L87 Difference]: Start difference. First operand 605 states and 1903 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:00,845 INFO L93 Difference]: Finished difference Result 772 states and 2234 transitions. [2021-06-05 14:05:00,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:05:00,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:05:00,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:00,846 INFO L225 Difference]: With dead ends: 772 [2021-06-05 14:05:00,846 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 14:05:00,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:05:00,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 14:05:00,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 605. [2021-06-05 14:05:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1490066225165565) internal successors, (1902), 604 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1902 transitions. [2021-06-05 14:05:00,853 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1902 transitions. Word has length 19 [2021-06-05 14:05:00,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:00,853 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1902 transitions. [2021-06-05 14:05:00,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1902 transitions. [2021-06-05 14:05:00,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:00,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:00,854 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:01,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10235,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:01,056 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:01,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:01,056 INFO L82 PathProgramCache]: Analyzing trace with hash 411305079, now seen corresponding path program 174 times [2021-06-05 14:05:01,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:01,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149841326] [2021-06-05 14:05:01,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:01,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:01,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149841326] [2021-06-05 14:05:01,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149841326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:01,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637862898] [2021-06-05 14:05:01,103 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 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 14:05:01,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:05:01,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:01,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:01,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:01,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637862898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:01,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:01,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:01,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700636027] [2021-06-05 14:05:01,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:01,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:01,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:01,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:01,160 INFO L87 Difference]: Start difference. First operand 605 states and 1902 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:01,312 INFO L93 Difference]: Finished difference Result 764 states and 2153 transitions. [2021-06-05 14:05:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:05:01,312 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:05:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:01,313 INFO L225 Difference]: With dead ends: 764 [2021-06-05 14:05:01,313 INFO L226 Difference]: Without dead ends: 764 [2021-06-05 14:05:01,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:05:01,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-06-05 14:05:01,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 593. [2021-06-05 14:05:01,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-06-05 14:05:01,320 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 19 [2021-06-05 14:05:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:01,320 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-06-05 14:05:01,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-06-05 14:05:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:01,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:01,321 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:01,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10236 [2021-06-05 14:05:01,523 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:01,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:01,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1478881924, now seen corresponding path program 175 times [2021-06-05 14:05:01,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:01,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261465128] [2021-06-05 14:05:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:01,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:01,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261465128] [2021-06-05 14:05:01,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261465128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:01,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420921303] [2021-06-05 14:05:01,571 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 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 14:05:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:01,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:01,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:01,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420921303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:01,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:01,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:01,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419361247] [2021-06-05 14:05:01,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:01,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:01,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:01,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:01,626 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:01,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:01,687 INFO L93 Difference]: Finished difference Result 677 states and 2039 transitions. [2021-06-05 14:05:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:05:01,688 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:05:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:01,688 INFO L225 Difference]: With dead ends: 677 [2021-06-05 14:05:01,688 INFO L226 Difference]: Without dead ends: 665 [2021-06-05 14:05:01,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:01,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-05 14:05:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 593. [2021-06-05 14:05:01,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1503378378378377) internal successors, (1865), 592 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1865 transitions. [2021-06-05 14:05:01,697 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1865 transitions. Word has length 19 [2021-06-05 14:05:01,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:01,698 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1865 transitions. [2021-06-05 14:05:01,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1865 transitions. [2021-06-05 14:05:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:01,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:01,699 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:01,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10237,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:01,913 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:01,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:01,913 INFO L82 PathProgramCache]: Analyzing trace with hash -856152099, now seen corresponding path program 176 times [2021-06-05 14:05:01,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:01,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729564086] [2021-06-05 14:05:01,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:01,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:01,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729564086] [2021-06-05 14:05:01,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729564086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:01,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233253385] [2021-06-05 14:05:01,956 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 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 14:05:01,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:01,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:01,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:01,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:02,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233253385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:02,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:02,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:02,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80087949] [2021-06-05 14:05:02,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:02,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:02,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:02,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:02,013 INFO L87 Difference]: Start difference. First operand 593 states and 1865 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:02,178 INFO L93 Difference]: Finished difference Result 742 states and 2108 transitions. [2021-06-05 14:05:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:05:02,179 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:05:02,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:02,179 INFO L225 Difference]: With dead ends: 742 [2021-06-05 14:05:02,179 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 14:05:02,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 14:05:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 587. [2021-06-05 14:05:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.151877133105802) internal successors, (1847), 586 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1847 transitions. [2021-06-05 14:05:02,186 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1847 transitions. Word has length 19 [2021-06-05 14:05:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:02,186 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1847 transitions. [2021-06-05 14:05:02,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1847 transitions. [2021-06-05 14:05:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:02,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:02,187 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:02,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10238 [2021-06-05 14:05:02,387 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:02,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:02,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1903193160, now seen corresponding path program 177 times [2021-06-05 14:05:02,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:02,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832015998] [2021-06-05 14:05:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:02,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:02,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832015998] [2021-06-05 14:05:02,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832015998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:02,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639753143] [2021-06-05 14:05:02,438 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 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 14:05:02,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:05:02,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:02,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:02,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:02,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639753143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:02,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:02,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:02,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592631126] [2021-06-05 14:05:02,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:02,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:02,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:02,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:02,513 INFO L87 Difference]: Start difference. First operand 587 states and 1847 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:02,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:02,568 INFO L93 Difference]: Finished difference Result 671 states and 2020 transitions. [2021-06-05 14:05:02,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:05:02,569 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:05:02,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:02,570 INFO L225 Difference]: With dead ends: 671 [2021-06-05 14:05:02,570 INFO L226 Difference]: Without dead ends: 657 [2021-06-05 14:05:02,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:02,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-05 14:05:02,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 587. [2021-06-05 14:05:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.150170648464164) internal successors, (1846), 586 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1846 transitions. [2021-06-05 14:05:02,582 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1846 transitions. Word has length 19 [2021-06-05 14:05:02,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:02,583 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1846 transitions. [2021-06-05 14:05:02,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1846 transitions. [2021-06-05 14:05:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:02,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:02,583 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:02,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10239,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:02,784 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:02,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1492618953, now seen corresponding path program 178 times [2021-06-05 14:05:02,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:02,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441905642] [2021-06-05 14:05:02,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:02,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:02,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441905642] [2021-06-05 14:05:02,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441905642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:02,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962471410] [2021-06-05 14:05:02,831 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 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 14:05:02,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:02,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:02,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:02,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:02,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962471410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:02,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:02,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:02,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382594702] [2021-06-05 14:05:02,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:02,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:02,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:02,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:02,889 INFO L87 Difference]: Start difference. First operand 587 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:03,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:03,063 INFO L93 Difference]: Finished difference Result 828 states and 2326 transitions. [2021-06-05 14:05:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:05:03,063 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:05:03,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:03,065 INFO L225 Difference]: With dead ends: 828 [2021-06-05 14:05:03,065 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 14:05:03,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:05:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 14:05:03,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 591. [2021-06-05 14:05:03,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1491525423728812) internal successors, (1858), 590 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1858 transitions. [2021-06-05 14:05:03,071 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1858 transitions. Word has length 19 [2021-06-05 14:05:03,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:03,071 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1858 transitions. [2021-06-05 14:05:03,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:03,071 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1858 transitions. [2021-06-05 14:05:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:03,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:03,072 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:03,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10240,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:03,273 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:03,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:03,273 INFO L82 PathProgramCache]: Analyzing trace with hash 290615364, now seen corresponding path program 179 times [2021-06-05 14:05:03,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:03,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941827789] [2021-06-05 14:05:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:03,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:03,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941827789] [2021-06-05 14:05:03,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941827789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:03,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144300688] [2021-06-05 14:05:03,323 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 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 14:05:03,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:05:03,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:03,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:03,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:03,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144300688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:03,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:03,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:05:03,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398816306] [2021-06-05 14:05:03,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:05:03,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:03,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:05:03,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:05:03,386 INFO L87 Difference]: Start difference. First operand 591 states and 1858 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:03,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:03,451 INFO L93 Difference]: Finished difference Result 869 states and 2474 transitions. [2021-06-05 14:05:03,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:05:03,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-06-05 14:05:03,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:03,452 INFO L225 Difference]: With dead ends: 869 [2021-06-05 14:05:03,452 INFO L226 Difference]: Without dead ends: 869 [2021-06-05 14:05:03,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-06-05 14:05:03,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 667. [2021-06-05 14:05:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.205705705705706) internal successors, (2135), 666 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2135 transitions. [2021-06-05 14:05:03,460 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2135 transitions. Word has length 19 [2021-06-05 14:05:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:03,460 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 2135 transitions. [2021-06-05 14:05:03,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2135 transitions. [2021-06-05 14:05:03,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:03,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:03,461 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:03,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10241,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:03,661 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:03,661 INFO L82 PathProgramCache]: Analyzing trace with hash -486534235, now seen corresponding path program 180 times [2021-06-05 14:05:03,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:03,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147592576] [2021-06-05 14:05:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:03,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:03,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147592576] [2021-06-05 14:05:03,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147592576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:03,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835939502] [2021-06-05 14:05:03,710 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 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 14:05:03,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:05:03,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:03,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:03,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:03,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835939502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:03,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:03,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:05:03,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507225583] [2021-06-05 14:05:03,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:05:03,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:03,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:05:03,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:05:03,758 INFO L87 Difference]: Start difference. First operand 667 states and 2135 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:03,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:03,887 INFO L93 Difference]: Finished difference Result 878 states and 2501 transitions. [2021-06-05 14:05:03,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:05:03,887 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-06-05 14:05:03,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:03,888 INFO L225 Difference]: With dead ends: 878 [2021-06-05 14:05:03,888 INFO L226 Difference]: Without dead ends: 876 [2021-06-05 14:05:03,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:05:03,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-06-05 14:05:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 684. [2021-06-05 14:05:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.2225475841874083) internal successors, (2201), 683 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:03,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2201 transitions. [2021-06-05 14:05:03,896 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2201 transitions. Word has length 19 [2021-06-05 14:05:03,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:03,897 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 2201 transitions. [2021-06-05 14:05:03,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:03,897 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2201 transitions. [2021-06-05 14:05:03,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:03,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:03,897 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:04,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10242 [2021-06-05 14:05:04,098 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:04,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:04,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1434864094, now seen corresponding path program 181 times [2021-06-05 14:05:04,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:04,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631178692] [2021-06-05 14:05:04,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:04,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:04,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631178692] [2021-06-05 14:05:04,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631178692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:04,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863377294] [2021-06-05 14:05:04,141 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 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 14:05:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:04,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:04,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:04,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863377294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:04,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:04,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:05:04,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171219475] [2021-06-05 14:05:04,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:05:04,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:04,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:05:04,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:05:04,188 INFO L87 Difference]: Start difference. First operand 684 states and 2201 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:04,300 INFO L93 Difference]: Finished difference Result 876 states and 2523 transitions. [2021-06-05 14:05:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:05:04,300 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-06-05 14:05:04,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:04,301 INFO L225 Difference]: With dead ends: 876 [2021-06-05 14:05:04,301 INFO L226 Difference]: Without dead ends: 874 [2021-06-05 14:05:04,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:05:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-06-05 14:05:04,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 669. [2021-06-05 14:05:04,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2050898203592815) internal successors, (2141), 668 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:04,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2141 transitions. [2021-06-05 14:05:04,309 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2141 transitions. Word has length 19 [2021-06-05 14:05:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:04,309 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2141 transitions. [2021-06-05 14:05:04,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2141 transitions. [2021-06-05 14:05:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:04,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:04,310 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:04,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10243 [2021-06-05 14:05:04,510 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:04,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:04,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1224079073, now seen corresponding path program 182 times [2021-06-05 14:05:04,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:04,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423743547] [2021-06-05 14:05:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:04,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:04,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423743547] [2021-06-05 14:05:04,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423743547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:04,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168528585] [2021-06-05 14:05:04,570 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 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 14:05:04,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:04,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:04,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:04,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:04,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168528585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:04,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:04,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:05:04,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603948876] [2021-06-05 14:05:04,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:05:04,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:04,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:05:04,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:05:04,623 INFO L87 Difference]: Start difference. First operand 669 states and 2141 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:04,692 INFO L93 Difference]: Finished difference Result 868 states and 2462 transitions. [2021-06-05 14:05:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:05:04,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-06-05 14:05:04,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:04,693 INFO L225 Difference]: With dead ends: 868 [2021-06-05 14:05:04,693 INFO L226 Difference]: Without dead ends: 868 [2021-06-05 14:05:04,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:04,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-06-05 14:05:04,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 674. [2021-06-05 14:05:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.2005943536404162) internal successors, (2154), 673 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2154 transitions. [2021-06-05 14:05:04,701 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2154 transitions. Word has length 19 [2021-06-05 14:05:04,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:04,701 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2154 transitions. [2021-06-05 14:05:04,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2154 transitions. [2021-06-05 14:05:04,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:04,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:04,701 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:04,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10244 [2021-06-05 14:05:04,902 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:04,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:04,902 INFO L82 PathProgramCache]: Analyzing trace with hash 54540902, now seen corresponding path program 183 times [2021-06-05 14:05:04,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:04,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187162637] [2021-06-05 14:05:04,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:04,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:04,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187162637] [2021-06-05 14:05:04,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187162637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:04,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107717347] [2021-06-05 14:05:04,943 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 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 14:05:04,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:05:04,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:04,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:04,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107717347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:04,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:04,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:05:04,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523567672] [2021-06-05 14:05:04,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:05:04,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:05:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:05:04,991 INFO L87 Difference]: Start difference. First operand 674 states and 2154 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:05,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:05,099 INFO L93 Difference]: Finished difference Result 905 states and 2624 transitions. [2021-06-05 14:05:05,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:05:05,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-06-05 14:05:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:05,101 INFO L225 Difference]: With dead ends: 905 [2021-06-05 14:05:05,101 INFO L226 Difference]: Without dead ends: 901 [2021-06-05 14:05:05,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:05:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-06-05 14:05:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 674. [2021-06-05 14:05:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.199108469539376) internal successors, (2153), 673 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2153 transitions. [2021-06-05 14:05:05,109 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2153 transitions. Word has length 19 [2021-06-05 14:05:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:05,109 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2153 transitions. [2021-06-05 14:05:05,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:05,109 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2153 transitions. [2021-06-05 14:05:05,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:05,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:05,109 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:05,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10245 [2021-06-05 14:05:05,310 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:05,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:05,310 INFO L82 PathProgramCache]: Analyzing trace with hash -836780729, now seen corresponding path program 184 times [2021-06-05 14:05:05,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:05,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173654120] [2021-06-05 14:05:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:05,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:05,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173654120] [2021-06-05 14:05:05,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173654120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:05,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933210651] [2021-06-05 14:05:05,357 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:05,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:05,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:05,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:05,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:05,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933210651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:05,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:05,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:05:05,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496730298] [2021-06-05 14:05:05,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:05:05,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:05,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:05:05,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:05:05,420 INFO L87 Difference]: Start difference. First operand 674 states and 2153 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:05,513 INFO L93 Difference]: Finished difference Result 858 states and 2461 transitions. [2021-06-05 14:05:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:05:05,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-06-05 14:05:05,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:05,515 INFO L225 Difference]: With dead ends: 858 [2021-06-05 14:05:05,515 INFO L226 Difference]: Without dead ends: 858 [2021-06-05 14:05:05,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:05:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-06-05 14:05:05,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 687. [2021-06-05 14:05:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.2011661807580176) internal successors, (2196), 686 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2196 transitions. [2021-06-05 14:05:05,525 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2196 transitions. Word has length 19 [2021-06-05 14:05:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:05,525 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2196 transitions. [2021-06-05 14:05:05,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2196 transitions. [2021-06-05 14:05:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:05,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:05,526 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:05,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10246 [2021-06-05 14:05:05,741 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:05,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1018544478, now seen corresponding path program 185 times [2021-06-05 14:05:05,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:05,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175284545] [2021-06-05 14:05:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:05,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:05,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175284545] [2021-06-05 14:05:05,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175284545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:05,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702457168] [2021-06-05 14:05:05,781 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 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 14:05:05,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:05:05,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:05,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:05,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:05,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702457168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:05,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:05,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:05:05,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706774988] [2021-06-05 14:05:05,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:05:05,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:05,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:05:05,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:05:05,828 INFO L87 Difference]: Start difference. First operand 687 states and 2196 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:05,940 INFO L93 Difference]: Finished difference Result 936 states and 2753 transitions. [2021-06-05 14:05:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:05:05,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-06-05 14:05:05,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:05,942 INFO L225 Difference]: With dead ends: 936 [2021-06-05 14:05:05,942 INFO L226 Difference]: Without dead ends: 930 [2021-06-05 14:05:05,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:05:05,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-05 14:05:05,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 695. [2021-06-05 14:05:05,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.2031700288184437) internal successors, (2223), 694 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:05,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2223 transitions. [2021-06-05 14:05:05,950 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2223 transitions. Word has length 19 [2021-06-05 14:05:05,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:05,951 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2223 transitions. [2021-06-05 14:05:05,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:05,951 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2223 transitions. [2021-06-05 14:05:05,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:05,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:05,952 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:06,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10247,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:06,165 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:06,165 INFO L82 PathProgramCache]: Analyzing trace with hash -298925151, now seen corresponding path program 186 times [2021-06-05 14:05:06,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:06,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864823205] [2021-06-05 14:05:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:06,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:06,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864823205] [2021-06-05 14:05:06,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864823205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:06,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96660503] [2021-06-05 14:05:06,211 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 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 14:05:06,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:05:06,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:06,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:06,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:06,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96660503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:06,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:06,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:05:06,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028001940] [2021-06-05 14:05:06,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:05:06,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:06,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:05:06,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:05:06,264 INFO L87 Difference]: Start difference. First operand 695 states and 2223 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:06,343 INFO L93 Difference]: Finished difference Result 835 states and 2456 transitions. [2021-06-05 14:05:06,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:05:06,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-06-05 14:05:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:06,344 INFO L225 Difference]: With dead ends: 835 [2021-06-05 14:05:06,344 INFO L226 Difference]: Without dead ends: 835 [2021-06-05 14:05:06,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:05:06,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-06-05 14:05:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 707. [2021-06-05 14:05:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.2011331444759206) internal successors, (2260), 706 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2260 transitions. [2021-06-05 14:05:06,352 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2260 transitions. Word has length 19 [2021-06-05 14:05:06,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:06,352 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2260 transitions. [2021-06-05 14:05:06,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2260 transitions. [2021-06-05 14:05:06,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:06,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:06,353 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:06,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10248 [2021-06-05 14:05:06,554 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:06,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:06,554 INFO L82 PathProgramCache]: Analyzing trace with hash 75547110, now seen corresponding path program 187 times [2021-06-05 14:05:06,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:06,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473488553] [2021-06-05 14:05:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:06,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:06,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473488553] [2021-06-05 14:05:06,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473488553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:06,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540351307] [2021-06-05 14:05:06,594 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 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 14:05:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:06,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:06,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:05:06,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540351307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:06,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:06,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:05:06,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917177378] [2021-06-05 14:05:06,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:05:06,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:06,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:05:06,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:05:06,640 INFO L87 Difference]: Start difference. First operand 707 states and 2260 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:06,741 INFO L93 Difference]: Finished difference Result 914 states and 2697 transitions. [2021-06-05 14:05:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:05:06,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-06-05 14:05:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:06,743 INFO L225 Difference]: With dead ends: 914 [2021-06-05 14:05:06,743 INFO L226 Difference]: Without dead ends: 906 [2021-06-05 14:05:06,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:05:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-06-05 14:05:06,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 707. [2021-06-05 14:05:06,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.198300283286119) internal successors, (2258), 706 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2258 transitions. [2021-06-05 14:05:06,752 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2258 transitions. Word has length 19 [2021-06-05 14:05:06,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:06,752 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2258 transitions. [2021-06-05 14:05:06,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2258 transitions. [2021-06-05 14:05:06,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:06,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:06,753 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:06,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10249,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:06,953 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:06,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:06,954 INFO L82 PathProgramCache]: Analyzing trace with hash -805271417, now seen corresponding path program 188 times [2021-06-05 14:05:06,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:06,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283379337] [2021-06-05 14:05:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:07,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:07,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283379337] [2021-06-05 14:05:07,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283379337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:07,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186440329] [2021-06-05 14:05:07,001 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 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 14:05:07,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:07,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:07,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:07,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:05:07,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186440329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:07,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:07,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:05:07,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496052668] [2021-06-05 14:05:07,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:05:07,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:07,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:05:07,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:05:07,053 INFO L87 Difference]: Start difference. First operand 707 states and 2258 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:07,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:07,124 INFO L93 Difference]: Finished difference Result 812 states and 2469 transitions. [2021-06-05 14:05:07,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:05:07,125 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 19 [2021-06-05 14:05:07,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:07,126 INFO L225 Difference]: With dead ends: 812 [2021-06-05 14:05:07,126 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 14:05:07,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:07,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 14:05:07,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 737. [2021-06-05 14:05:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.1956521739130435) internal successors, (2352), 736 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2352 transitions. [2021-06-05 14:05:07,140 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2352 transitions. Word has length 19 [2021-06-05 14:05:07,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:07,140 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2352 transitions. [2021-06-05 14:05:07,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:05:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2352 transitions. [2021-06-05 14:05:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:07,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:07,141 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:07,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10250,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:07,341 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:07,342 INFO L82 PathProgramCache]: Analyzing trace with hash -367352030, now seen corresponding path program 189 times [2021-06-05 14:05:07,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:07,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131575385] [2021-06-05 14:05:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:07,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:07,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131575385] [2021-06-05 14:05:07,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131575385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:07,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771556719] [2021-06-05 14:05:07,381 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 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 14:05:07,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:05:07,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:07,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:07,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:07,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771556719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:07,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:07,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:07,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462655682] [2021-06-05 14:05:07,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:07,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:07,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:07,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:07,437 INFO L87 Difference]: Start difference. First operand 737 states and 2352 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:07,552 INFO L93 Difference]: Finished difference Result 930 states and 2762 transitions. [2021-06-05 14:05:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:05:07,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 14:05:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:07,553 INFO L225 Difference]: With dead ends: 930 [2021-06-05 14:05:07,553 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 14:05:07,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:05:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 14:05:07,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 766. [2021-06-05 14:05:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.197385620915033) internal successors, (2446), 765 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:07,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2446 transitions. [2021-06-05 14:05:07,562 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2446 transitions. Word has length 19 [2021-06-05 14:05:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:07,562 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 2446 transitions. [2021-06-05 14:05:07,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2446 transitions. [2021-06-05 14:05:07,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:07,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:07,563 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:07,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10251,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:07,763 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:07,764 INFO L82 PathProgramCache]: Analyzing trace with hash 677863521, now seen corresponding path program 190 times [2021-06-05 14:05:07,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:07,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457502229] [2021-06-05 14:05:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:07,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:07,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457502229] [2021-06-05 14:05:07,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457502229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:07,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015408190] [2021-06-05 14:05:07,811 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 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 14:05:07,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:07,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:07,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:07,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:07,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015408190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:07,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:07,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:07,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97990540] [2021-06-05 14:05:07,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:07,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:07,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:07,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:07,869 INFO L87 Difference]: Start difference. First operand 766 states and 2446 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:07,987 INFO L93 Difference]: Finished difference Result 870 states and 2608 transitions. [2021-06-05 14:05:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:05:07,987 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 14:05:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:07,988 INFO L225 Difference]: With dead ends: 870 [2021-06-05 14:05:07,989 INFO L226 Difference]: Without dead ends: 870 [2021-06-05 14:05:07,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:05:07,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-06-05 14:05:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 762. [2021-06-05 14:05:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1984231274638635) internal successors, (2434), 761 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2434 transitions. [2021-06-05 14:05:07,996 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2434 transitions. Word has length 19 [2021-06-05 14:05:07,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:07,996 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2434 transitions. [2021-06-05 14:05:07,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:07,997 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2434 transitions. [2021-06-05 14:05:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:07,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:07,997 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:08,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10252,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:08,198 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:08,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1212323482, now seen corresponding path program 191 times [2021-06-05 14:05:08,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:08,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301327424] [2021-06-05 14:05:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:08,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:08,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301327424] [2021-06-05 14:05:08,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301327424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:08,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010639256] [2021-06-05 14:05:08,239 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 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 14:05:08,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:05:08,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:08,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:08,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:08,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010639256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:08,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:08,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:08,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689650764] [2021-06-05 14:05:08,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:08,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:08,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:08,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:08,293 INFO L87 Difference]: Start difference. First operand 762 states and 2434 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:08,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:08,364 INFO L93 Difference]: Finished difference Result 853 states and 2620 transitions. [2021-06-05 14:05:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:05:08,364 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 14:05:08,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:08,365 INFO L225 Difference]: With dead ends: 853 [2021-06-05 14:05:08,365 INFO L226 Difference]: Without dead ends: 841 [2021-06-05 14:05:08,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:08,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-05 14:05:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 762. [2021-06-05 14:05:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1971090670170828) internal successors, (2433), 761 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2433 transitions. [2021-06-05 14:05:08,373 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2433 transitions. Word has length 19 [2021-06-05 14:05:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:08,373 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2433 transitions. [2021-06-05 14:05:08,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2433 transitions. [2021-06-05 14:05:08,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:08,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:08,374 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:08,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10253,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:08,574 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:08,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:08,574 INFO L82 PathProgramCache]: Analyzing trace with hash -589593657, now seen corresponding path program 192 times [2021-06-05 14:05:08,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:08,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185949575] [2021-06-05 14:05:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:08,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:08,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185949575] [2021-06-05 14:05:08,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185949575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:08,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33092023] [2021-06-05 14:05:08,622 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 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 14:05:08,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:05:08,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:08,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:08,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:08,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33092023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:08,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:08,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:08,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623413899] [2021-06-05 14:05:08,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:08,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:08,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:08,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:08,690 INFO L87 Difference]: Start difference. First operand 762 states and 2433 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:08,831 INFO L93 Difference]: Finished difference Result 875 states and 2625 transitions. [2021-06-05 14:05:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:05:08,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 14:05:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:08,832 INFO L225 Difference]: With dead ends: 875 [2021-06-05 14:05:08,832 INFO L226 Difference]: Without dead ends: 875 [2021-06-05 14:05:08,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:05:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-05 14:05:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 759. [2021-06-05 14:05:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1978891820580473) internal successors, (2424), 758 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2424 transitions. [2021-06-05 14:05:08,840 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2424 transitions. Word has length 19 [2021-06-05 14:05:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:08,840 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2424 transitions. [2021-06-05 14:05:08,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2424 transitions. [2021-06-05 14:05:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:08,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:08,841 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:09,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10254 [2021-06-05 14:05:09,042 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:09,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1636634718, now seen corresponding path program 193 times [2021-06-05 14:05:09,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:09,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892989098] [2021-06-05 14:05:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:09,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:09,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892989098] [2021-06-05 14:05:09,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892989098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:09,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795503231] [2021-06-05 14:05:09,087 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 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 14:05:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:09,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:09,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:09,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795503231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:09,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:09,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:09,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380078401] [2021-06-05 14:05:09,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:09,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:09,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:09,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:09,141 INFO L87 Difference]: Start difference. First operand 759 states and 2424 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:09,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:09,198 INFO L93 Difference]: Finished difference Result 848 states and 2607 transitions. [2021-06-05 14:05:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:05:09,198 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 14:05:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:09,199 INFO L225 Difference]: With dead ends: 848 [2021-06-05 14:05:09,199 INFO L226 Difference]: Without dead ends: 834 [2021-06-05 14:05:09,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:09,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-06-05 14:05:09,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 759. [2021-06-05 14:05:09,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:09,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-06-05 14:05:09,207 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-06-05 14:05:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:09,207 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-06-05 14:05:09,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:09,207 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-06-05 14:05:09,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:09,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:09,208 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:09,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10255 [2021-06-05 14:05:09,409 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:09,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:09,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1226060511, now seen corresponding path program 194 times [2021-06-05 14:05:09,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:09,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419166442] [2021-06-05 14:05:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:09,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:09,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419166442] [2021-06-05 14:05:09,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419166442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:09,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526253636] [2021-06-05 14:05:09,460 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 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 14:05:09,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:09,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:09,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:09,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:09,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526253636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:09,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:09,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:09,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938581241] [2021-06-05 14:05:09,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:09,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:09,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:09,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:09,517 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:09,651 INFO L93 Difference]: Finished difference Result 921 states and 2738 transitions. [2021-06-05 14:05:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:05:09,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 14:05:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:09,652 INFO L225 Difference]: With dead ends: 921 [2021-06-05 14:05:09,652 INFO L226 Difference]: Without dead ends: 921 [2021-06-05 14:05:09,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:05:09,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-06-05 14:05:09,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 759. [2021-06-05 14:05:09,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:09,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-06-05 14:05:09,660 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-06-05 14:05:09,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:09,660 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-06-05 14:05:09,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:09,660 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-06-05 14:05:09,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:09,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:09,661 INFO L521 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:09,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10256 [2021-06-05 14:05:09,862 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:09,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:09,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1905381146, now seen corresponding path program 195 times [2021-06-05 14:05:09,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:09,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243342191] [2021-06-05 14:05:09,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:09,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:09,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243342191] [2021-06-05 14:05:09,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243342191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:09,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918657372] [2021-06-05 14:05:09,911 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 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 14:05:09,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:05:09,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:09,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:09,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:09,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918657372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:09,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:09,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:09,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433392625] [2021-06-05 14:05:09,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:09,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:09,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:09,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:09,976 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:10,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:10,030 INFO L93 Difference]: Finished difference Result 846 states and 2603 transitions. [2021-06-05 14:05:10,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:05:10,030 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 14:05:10,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:10,031 INFO L225 Difference]: With dead ends: 846 [2021-06-05 14:05:10,031 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 14:05:10,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:05:10,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 14:05:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 757. [2021-06-05 14:05:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.1997354497354498) internal successors, (2419), 756 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2419 transitions. [2021-06-05 14:05:10,040 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2419 transitions. Word has length 19 [2021-06-05 14:05:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:10,040 INFO L482 AbstractCegarLoop]: Abstraction has 757 states and 2419 transitions. [2021-06-05 14:05:10,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:10,040 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2419 transitions. [2021-06-05 14:05:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:10,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:10,042 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:10,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10257 [2021-06-05 14:05:10,247 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:10,247 INFO L82 PathProgramCache]: Analyzing trace with hash 518303495, now seen corresponding path program 196 times [2021-06-05 14:05:10,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:10,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861676756] [2021-06-05 14:05:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:10,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:10,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861676756] [2021-06-05 14:05:10,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861676756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:10,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28594341] [2021-06-05 14:05:10,300 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 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 14:05:10,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:10,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:10,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:10,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:10,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28594341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:10,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:10,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:10,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068409949] [2021-06-05 14:05:10,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:10,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:10,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:10,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:10,355 INFO L87 Difference]: Start difference. First operand 757 states and 2419 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:10,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:10,494 INFO L93 Difference]: Finished difference Result 1025 states and 3016 transitions. [2021-06-05 14:05:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:05:10,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 19 [2021-06-05 14:05:10,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:10,496 INFO L225 Difference]: With dead ends: 1025 [2021-06-05 14:05:10,496 INFO L226 Difference]: Without dead ends: 1025 [2021-06-05 14:05:10,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:05:10,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-06-05 14:05:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 769. [2021-06-05 14:05:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.1927083333333335) internal successors, (2452), 768 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:10,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2452 transitions. [2021-06-05 14:05:10,504 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2452 transitions. Word has length 19 [2021-06-05 14:05:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:10,504 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2452 transitions. [2021-06-05 14:05:10,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:05:10,504 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2452 transitions. [2021-06-05 14:05:10,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:05:10,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:10,505 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:10,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10258 [2021-06-05 14:05:10,728 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:10,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:10,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1714157417, now seen corresponding path program 197 times [2021-06-05 14:05:10,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:10,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466986918] [2021-06-05 14:05:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:10,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:10,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466986918] [2021-06-05 14:05:10,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466986918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:10,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596605057] [2021-06-05 14:05:10,859 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 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 14:05:10,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:05:10,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:10,884 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 14:05:10,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:11,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:11,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:05:11,836 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 262 [2021-06-05 14:05:12,762 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 245 [2021-06-05 14:05:12,916 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 332 [2021-06-05 14:05:13,129 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 394 [2021-06-05 14:05:13,417 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 384 [2021-06-05 14:05:13,703 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 384 [2021-06-05 14:05:14,011 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 389 [2021-06-05 14:05:14,260 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 359 [2021-06-05 14:05:14,399 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 251 [2021-06-05 14:05:14,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:14,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:14,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:05:14,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:05:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:14,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596605057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:14,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:14,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 14:05:14,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492961814] [2021-06-05 14:05:14,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 14:05:14,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:14,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 14:05:14,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:05:14,968 INFO L87 Difference]: Start difference. First operand 769 states and 2452 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:15,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:15,332 INFO L93 Difference]: Finished difference Result 853 states and 2629 transitions. [2021-06-05 14:05:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:05:15,332 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:05:15,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:15,333 INFO L225 Difference]: With dead ends: 853 [2021-06-05 14:05:15,333 INFO L226 Difference]: Without dead ends: 826 [2021-06-05 14:05:15,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 381.7ms TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:05:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-05 14:05:15,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 787. [2021-06-05 14:05:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.1895674300254453) internal successors, (2507), 786 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2507 transitions. [2021-06-05 14:05:15,342 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2507 transitions. Word has length 20 [2021-06-05 14:05:15,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:15,342 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2507 transitions. [2021-06-05 14:05:15,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:15,342 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2507 transitions. [2021-06-05 14:05:15,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:05:15,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:15,343 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:15,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10259,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:15,543 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:15,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:15,544 INFO L82 PathProgramCache]: Analyzing trace with hash -122454295, now seen corresponding path program 198 times [2021-06-05 14:05:15,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:15,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793762547] [2021-06-05 14:05:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:15,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:15,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793762547] [2021-06-05 14:05:15,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793762547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:15,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466439383] [2021-06-05 14:05:15,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:05:15,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:05:15,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:15,665 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 14:05:15,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:16,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:16,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:05:16,737 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 353 [2021-06-05 14:05:18,117 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 349 [2021-06-05 14:05:18,311 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 349 [2021-06-05 14:05:18,539 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 356 [2021-06-05 14:05:18,736 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 338 [2021-06-05 14:05:19,001 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 192 [2021-06-05 14:05:19,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:19,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:19,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:05:19,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:05:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:19,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466439383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:19,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:19,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 14:05:19,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947423001] [2021-06-05 14:05:19,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:05:19,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:19,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:05:19,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:05:19,620 INFO L87 Difference]: Start difference. First operand 787 states and 2507 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:20,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:20,008 INFO L93 Difference]: Finished difference Result 877 states and 2701 transitions. [2021-06-05 14:05:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:05:20,008 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:05:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:20,010 INFO L225 Difference]: With dead ends: 877 [2021-06-05 14:05:20,010 INFO L226 Difference]: Without dead ends: 861 [2021-06-05 14:05:20,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 338.8ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:05:20,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-06-05 14:05:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 806. [2021-06-05 14:05:20,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-06-05 14:05:20,019 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-06-05 14:05:20,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:20,019 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-06-05 14:05:20,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:20,019 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-06-05 14:05:20,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:05:20,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:20,020 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:20,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10557 [2021-06-05 14:05:20,220 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:20,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:20,221 INFO L82 PathProgramCache]: Analyzing trace with hash 736420235, now seen corresponding path program 199 times [2021-06-05 14:05:20,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:20,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874128611] [2021-06-05 14:05:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:20,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:20,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874128611] [2021-06-05 14:05:20,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874128611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:20,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782372083] [2021-06-05 14:05:20,323 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 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 14:05:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:20,346 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 14:05:20,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:21,005 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 2028 DAG size of output: 48 [2021-06-05 14:05:21,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:21,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:05:21,598 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 188 [2021-06-05 14:05:22,247 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 237 [2021-06-05 14:05:22,429 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 308 [2021-06-05 14:05:22,611 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 308 [2021-06-05 14:05:22,821 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 313 [2021-06-05 14:05:22,971 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 274 [2021-06-05 14:05:23,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:24,072 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 14:05:24,072 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 14:05:24,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 14:05:25,115 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 241 [2021-06-05 14:05:25,278 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 264 [2021-06-05 14:05:26,099 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 354 [2021-06-05 14:05:26,412 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 354 [2021-06-05 14:05:26,767 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 364 [2021-06-05 14:05:26,949 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 245 [2021-06-05 14:05:27,086 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 248 [2021-06-05 14:05:27,925 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 225 [2021-06-05 14:05:28,078 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-06-05 14:05:28,243 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-06-05 14:05:28,407 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 240 [2021-06-05 14:05:28,576 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 248 [2021-06-05 14:05:28,939 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 168 [2021-06-05 14:05:29,452 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 176 [2021-06-05 14:05:30,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:05:30,354 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 14:05:30,354 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 14:05:30,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 14:05:30,962 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 263 [2021-06-05 14:05:31,975 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 267 [2021-06-05 14:05:32,155 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 283 [2021-06-05 14:05:32,321 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 296 [2021-06-05 14:05:33,614 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 314 [2021-06-05 14:05:33,809 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 339 [2021-06-05 14:05:34,222 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 777 DAG size of output: 513 [2021-06-05 14:05:34,736 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 531 [2021-06-05 14:05:35,230 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 531 [2021-06-05 14:05:35,850 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 873 DAG size of output: 543 [2021-06-05 14:05:36,295 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 456 [2021-06-05 14:05:36,687 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 292 [2021-06-05 14:05:37,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:05:37,637 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:05:37,637 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:05:37,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:05:38,997 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 242 [2021-06-05 14:05:39,450 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 239 [2021-06-05 14:05:39,601 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 239 [2021-06-05 14:05:39,806 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 253 [2021-06-05 14:05:40,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:05:40,575 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 14:05:40,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:05:40,575 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 14:05:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:40,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782372083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:40,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:40,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 14:05:40,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540690447] [2021-06-05 14:05:40,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:05:40,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:40,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:05:40,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:05:40,603 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:40,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:40,958 INFO L93 Difference]: Finished difference Result 901 states and 2754 transitions. [2021-06-05 14:05:40,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:05:40,958 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:05:40,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:40,959 INFO L225 Difference]: With dead ends: 901 [2021-06-05 14:05:40,959 INFO L226 Difference]: Without dead ends: 891 [2021-06-05 14:05:40,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 328.2ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:05:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-05 14:05:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 806. [2021-06-05 14:05:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-06-05 14:05:40,968 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-06-05 14:05:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:40,968 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-06-05 14:05:40,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-06-05 14:05:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:05:40,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:40,969 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:41,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10960,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:41,170 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:41,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:41,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1564059463, now seen corresponding path program 200 times [2021-06-05 14:05:41,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:41,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123670802] [2021-06-05 14:05:41,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:41,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:41,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123670802] [2021-06-05 14:05:41,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123670802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:41,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136136867] [2021-06-05 14:05:41,285 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 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 14:05:41,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:41,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:41,308 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 14:05:41,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:41,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:41,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:05:43,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:43,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:43,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:05:43,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:05:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:43,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136136867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:43,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:43,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 14:05:43,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205008155] [2021-06-05 14:05:43,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:05:43,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:43,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:05:43,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:05:43,062 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:43,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:43,478 INFO L93 Difference]: Finished difference Result 938 states and 2953 transitions. [2021-06-05 14:05:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:05:43,479 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:05:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:43,480 INFO L225 Difference]: With dead ends: 938 [2021-06-05 14:05:43,480 INFO L226 Difference]: Without dead ends: 922 [2021-06-05 14:05:43,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:05:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-06-05 14:05:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 871. [2021-06-05 14:05:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.2367816091954023) internal successors, (2816), 870 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:43,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2816 transitions. [2021-06-05 14:05:43,490 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2816 transitions. Word has length 20 [2021-06-05 14:05:43,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:43,490 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2816 transitions. [2021-06-05 14:05:43,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2816 transitions. [2021-06-05 14:05:43,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:05:43,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:43,491 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:43,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12509,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:43,692 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:43,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:43,692 INFO L82 PathProgramCache]: Analyzing trace with hash -705184933, now seen corresponding path program 201 times [2021-06-05 14:05:43,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:43,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166922820] [2021-06-05 14:05:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:43,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:43,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166922820] [2021-06-05 14:05:43,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166922820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:43,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935777929] [2021-06-05 14:05:43,792 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 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 14:05:43,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:05:43,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:43,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 14:05:43,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:44,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:44,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:05:44,946 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 262 [2021-06-05 14:05:45,246 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 358 [2021-06-05 14:05:45,478 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 318 [2021-06-05 14:05:45,750 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 183 [2021-06-05 14:05:46,608 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 202 [2021-06-05 14:05:46,711 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 213 [2021-06-05 14:05:46,886 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 158 [2021-06-05 14:05:47,469 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 261 [2021-06-05 14:05:47,712 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 261 [2021-06-05 14:05:47,954 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 268 [2021-06-05 14:05:48,081 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 231 [2021-06-05 14:05:48,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:49,061 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 14:05:49,062 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 14:05:49,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 14:05:50,695 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 212 [2021-06-05 14:05:50,897 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 224 [2021-06-05 14:05:51,152 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 239 [2021-06-05 14:05:52,090 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 221 [2021-06-05 14:05:52,266 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 231 [2021-06-05 14:05:52,541 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 252 [2021-06-05 14:05:52,814 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 262 [2021-06-05 14:05:53,376 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 329 [2021-06-05 14:05:54,016 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 348 [2021-06-05 14:05:55,102 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 185 [2021-06-05 14:05:55,291 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 234 [2021-06-05 14:05:55,504 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 249 [2021-06-05 14:05:55,771 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 259 [2021-06-05 14:05:56,050 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 272 [2021-06-05 14:05:56,773 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 206 [2021-06-05 14:05:56,890 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 214 [2021-06-05 14:05:57,038 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 241 [2021-06-05 14:05:57,218 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 251 [2021-06-05 14:05:57,465 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 294 [2021-06-05 14:05:58,030 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 622 DAG size of output: 359 [2021-06-05 14:05:58,724 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 398 [2021-06-05 14:05:59,493 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 399 [2021-06-05 14:06:01,059 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 965 DAG size of output: 559 [2021-06-05 14:06:02,839 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 1033 DAG size of output: 607 [2021-06-05 14:06:04,836 WARN L205 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 1033 DAG size of output: 607 [2021-06-05 14:06:06,709 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 1039 DAG size of output: 578 [2021-06-05 14:06:08,010 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 580 DAG size of output: 594 [2021-06-05 14:06:09,199 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 573 DAG size of output: 578 [2021-06-05 14:06:10,571 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 567 DAG size of output: 601 [2021-06-05 14:06:11,968 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 562 DAG size of output: 494 [2021-06-05 14:06:12,090 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 443 [2021-06-05 14:06:12,278 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 409 [2021-06-05 14:06:13,218 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 210 [2021-06-05 14:06:13,339 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 216 [2021-06-05 14:06:13,490 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 235 [2021-06-05 14:06:13,659 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 265 [2021-06-05 14:06:13,908 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 299 [2021-06-05 14:06:14,294 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 359 [2021-06-05 14:06:14,776 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 550 DAG size of output: 376 [2021-06-05 14:06:15,356 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 422 [2021-06-05 14:06:15,945 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 422 [2021-06-05 14:06:16,632 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 426 [2021-06-05 14:06:17,664 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 428 DAG size of output: 651 [2021-06-05 14:06:18,328 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 343 [2021-06-05 14:06:18,765 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 284 [2021-06-05 14:06:19,143 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 351 [2021-06-05 14:06:20,114 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 272 [2021-06-05 14:06:20,300 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 286 [2021-06-05 14:06:20,614 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 392 [2021-06-05 14:06:21,245 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 453 [2021-06-05 14:06:21,922 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 323 [2021-06-05 14:06:22,822 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 259 [2021-06-05 14:06:23,019 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 270 [2021-06-05 14:06:23,194 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 273 [2021-06-05 14:06:23,500 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 313 [2021-06-05 14:06:23,936 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 382 [2021-06-05 14:06:24,355 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 444 [2021-06-05 14:06:25,197 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 679 [2021-06-05 14:06:26,027 WARN L205 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 679 [2021-06-05 14:06:26,949 WARN L205 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 1028 DAG size of output: 677 [2021-06-05 14:06:27,210 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 258 [2021-06-05 14:06:27,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:06:28,113 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 14:06:28,114 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 14:06:28,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 14:06:29,326 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 410 [2021-06-05 14:06:29,505 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 410 [2021-06-05 14:06:29,758 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 416 [2021-06-05 14:06:30,073 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 522 [2021-06-05 14:06:30,464 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 518 [2021-06-05 14:06:30,806 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 479 [2021-06-05 14:06:31,120 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 485 [2021-06-05 14:06:31,372 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 350 [2021-06-05 14:06:32,155 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 347 [2021-06-05 14:06:32,498 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 416 [2021-06-05 14:06:32,689 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 331 [2021-06-05 14:06:33,579 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-06-05 14:06:34,096 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 747 DAG size of output: 576 [2021-06-05 14:06:34,895 WARN L205 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 969 DAG size of output: 660 [2021-06-05 14:06:35,087 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 352 [2021-06-05 14:06:35,243 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 303 [2021-06-05 14:06:35,794 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 248 [2021-06-05 14:06:36,403 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 390 [2021-06-05 14:06:36,526 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 249 [2021-06-05 14:06:36,650 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 227 [2021-06-05 14:06:37,022 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 241 [2021-06-05 14:06:37,130 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 206 [2021-06-05 14:06:37,664 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 334 [2021-06-05 14:06:38,171 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 554 [2021-06-05 14:06:39,238 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1305 DAG size of output: 734 [2021-06-05 14:06:40,595 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 1481 DAG size of output: 824 [2021-06-05 14:06:41,950 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 1481 DAG size of output: 824 [2021-06-05 14:06:43,599 WARN L205 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 1487 DAG size of output: 829 [2021-06-05 14:06:45,332 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 831 DAG size of output: 1033 [2021-06-05 14:06:47,112 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 779 DAG size of output: 893 [2021-06-05 14:06:47,860 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 555 [2021-06-05 14:06:48,733 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 258 [2021-06-05 14:06:48,950 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 326 [2021-06-05 14:06:49,586 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 161 [2021-06-05 14:06:49,732 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 239 [2021-06-05 14:06:50,048 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 579 DAG size of output: 408 [2021-06-05 14:06:50,194 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 573 [2021-06-05 14:06:50,891 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 526 [2021-06-05 14:06:51,509 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 251 [2021-06-05 14:06:51,962 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 314 [2021-06-05 14:06:52,075 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 207 [2021-06-05 14:06:52,746 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 411 [2021-06-05 14:06:53,098 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 448 [2021-06-05 14:06:53,789 WARN L205 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 1102 DAG size of output: 720 [2021-06-05 14:06:54,748 WARN L205 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 619 [2021-06-05 14:06:55,303 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 481 [2021-06-05 14:06:55,475 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 242 [2021-06-05 14:06:56,096 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 246 [2021-06-05 14:06:56,685 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 261 [2021-06-05 14:06:56,914 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 295 [2021-06-05 14:06:57,281 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 359 [2021-06-05 14:06:58,264 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 264 [2021-06-05 14:06:58,439 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 269 [2021-06-05 14:06:58,807 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 449 [2021-06-05 14:06:59,977 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 1606 DAG size of output: 905 [2021-06-05 14:07:01,131 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 1606 DAG size of output: 905 [2021-06-05 14:07:02,465 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 1612 DAG size of output: 912 [2021-06-05 14:07:03,323 WARN L205 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 914 DAG size of output: 718 [2021-06-05 14:07:03,631 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 242 [2021-06-05 14:07:04,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:07:04,380 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:07:04,380 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:07:04,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:07:05,413 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 225 [2021-06-05 14:07:05,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:07:05,933 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 14:07:05,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:05,934 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 14:07:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:05,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935777929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:05,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:05,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 14:07:05,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185882985] [2021-06-05 14:07:05,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:07:05,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:05,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:07:05,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:07:05,962 INFO L87 Difference]: Start difference. First operand 871 states and 2816 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:06,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:06,365 INFO L93 Difference]: Finished difference Result 978 states and 3027 transitions. [2021-06-05 14:07:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:07:06,366 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:07:06,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:06,367 INFO L225 Difference]: With dead ends: 978 [2021-06-05 14:07:06,367 INFO L226 Difference]: Without dead ends: 959 [2021-06-05 14:07:06,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 375.7ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:07:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-06-05 14:07:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 869. [2021-06-05 14:07:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.224654377880184) internal successors, (2799), 868 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2799 transitions. [2021-06-05 14:07:06,376 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2799 transitions. Word has length 20 [2021-06-05 14:07:06,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:06,376 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2799 transitions. [2021-06-05 14:07:06,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2799 transitions. [2021-06-05 14:07:06,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:07:06,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:06,377 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:06,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12726,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:06,578 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:06,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:06,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1005428375, now seen corresponding path program 202 times [2021-06-05 14:07:06,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:06,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081540968] [2021-06-05 14:07:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:06,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:06,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081540968] [2021-06-05 14:07:06,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081540968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:06,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056385958] [2021-06-05 14:07:06,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:07:06,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:07:06,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:06,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 14:07:06,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:07,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:07,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:07:07,654 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 244 [2021-06-05 14:07:07,871 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 249 [2021-06-05 14:07:08,012 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 202 [2021-06-05 14:07:08,288 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 238 [2021-06-05 14:07:09,093 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 221 [2021-06-05 14:07:09,226 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 232 [2021-06-05 14:07:09,369 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 232 [2021-06-05 14:07:09,508 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 237 [2021-06-05 14:07:09,628 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 239 [2021-06-05 14:07:09,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:10,364 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 14:07:10,365 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 14:07:10,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 14:07:11,097 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 255 [2021-06-05 14:07:11,259 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 299 [2021-06-05 14:07:12,264 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 315 [2021-06-05 14:07:12,451 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 326 [2021-06-05 14:07:12,639 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 326 [2021-06-05 14:07:12,859 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 337 [2021-06-05 14:07:13,214 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 399 [2021-06-05 14:07:13,558 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 308 [2021-06-05 14:07:13,867 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 310 [2021-06-05 14:07:14,843 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 265 [2021-06-05 14:07:16,313 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 291 [2021-06-05 14:07:16,940 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 434 [2021-06-05 14:07:17,527 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 610 DAG size of output: 577 [2021-06-05 14:07:18,211 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 578 [2021-06-05 14:07:19,057 WARN L205 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 691 DAG size of output: 653 [2021-06-05 14:07:19,234 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 266 [2021-06-05 14:07:20,173 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 228 [2021-06-05 14:07:20,335 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 247 [2021-06-05 14:07:21,283 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 233 [2021-06-05 14:07:21,732 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 301 [2021-06-05 14:07:22,612 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 458 [2021-06-05 14:07:23,215 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 463 [2021-06-05 14:07:23,963 WARN L205 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 569 [2021-06-05 14:07:25,679 WARN L205 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 1194 DAG size of output: 1035 [2021-06-05 14:07:27,394 WARN L205 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 1194 DAG size of output: 1035 [2021-06-05 14:07:29,180 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 1200 DAG size of output: 859 [2021-06-05 14:07:30,474 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 861 DAG size of output: 700 [2021-06-05 14:07:31,419 WARN L205 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 650 DAG size of output: 590 [2021-06-05 14:07:31,953 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 672 [2021-06-05 14:07:32,914 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 215 [2021-06-05 14:07:33,116 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 230 [2021-06-05 14:07:33,290 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 230 [2021-06-05 14:07:33,482 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 234 [2021-06-05 14:07:33,645 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 255 [2021-06-05 14:07:34,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:07:34,638 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 14:07:34,638 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 14:07:34,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 14:07:36,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:07:37,029 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:07:37,029 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:07:37,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:07:38,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:07:38,200 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 14:07:38,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:38,200 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 14:07:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:38,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056385958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:38,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:38,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 14:07:38,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811082290] [2021-06-05 14:07:38,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:07:38,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:38,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:07:38,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:07:38,228 INFO L87 Difference]: Start difference. First operand 869 states and 2799 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:38,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:38,684 INFO L93 Difference]: Finished difference Result 942 states and 2954 transitions. [2021-06-05 14:07:38,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:07:38,684 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:07:38,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:38,685 INFO L225 Difference]: With dead ends: 942 [2021-06-05 14:07:38,686 INFO L226 Difference]: Without dead ends: 932 [2021-06-05 14:07:38,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 392.0ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:07:38,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-06-05 14:07:38,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 872. [2021-06-05 14:07:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.2238805970149254) internal successors, (2808), 871 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2808 transitions. [2021-06-05 14:07:38,695 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2808 transitions. Word has length 20 [2021-06-05 14:07:38,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:38,695 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2808 transitions. [2021-06-05 14:07:38,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:38,695 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2808 transitions. [2021-06-05 14:07:38,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:07:38,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:38,696 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:38,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15864 [2021-06-05 14:07:38,897 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:38,897 INFO L82 PathProgramCache]: Analyzing trace with hash 990820585, now seen corresponding path program 203 times [2021-06-05 14:07:38,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:38,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740476863] [2021-06-05 14:07:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:38,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:38,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740476863] [2021-06-05 14:07:38,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740476863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:38,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828330982] [2021-06-05 14:07:38,993 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 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 14:07:39,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:07:39,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:39,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 14:07:39,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:39,468 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:07:39,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:39,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:07:40,504 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 475 [2021-06-05 14:07:40,737 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 485 [2021-06-05 14:07:40,948 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 485 [2021-06-05 14:07:41,194 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 496 [2021-06-05 14:07:41,500 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 658 [2021-06-05 14:07:41,653 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 446 [2021-06-05 14:07:42,471 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 294 [2021-06-05 14:07:42,614 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 294 [2021-06-05 14:07:42,853 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 318 [2021-06-05 14:07:43,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:43,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:43,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:07:43,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:3 [2021-06-05 14:07:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:43,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828330982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:43,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:43,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 14:07:43,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579469779] [2021-06-05 14:07:43,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:07:43,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:43,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:07:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:07:43,313 INFO L87 Difference]: Start difference. First operand 872 states and 2808 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:43,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:43,958 INFO L93 Difference]: Finished difference Result 1010 states and 3206 transitions. [2021-06-05 14:07:43,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:07:43,958 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:07:43,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:43,960 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 14:07:43,960 INFO L226 Difference]: Without dead ends: 994 [2021-06-05 14:07:43,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:07:43,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-05 14:07:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 941. [2021-06-05 14:07:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.2542553191489363) internal successors, (3059), 940 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3059 transitions. [2021-06-05 14:07:43,971 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3059 transitions. Word has length 20 [2021-06-05 14:07:43,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:43,971 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 3059 transitions. [2021-06-05 14:07:43,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3059 transitions. [2021-06-05 14:07:43,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:07:43,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:43,972 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:44,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18783 [2021-06-05 14:07:44,173 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:44,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:44,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1849695115, now seen corresponding path program 204 times [2021-06-05 14:07:44,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:44,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112102882] [2021-06-05 14:07:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:44,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:44,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112102882] [2021-06-05 14:07:44,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112102882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:44,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400349414] [2021-06-05 14:07:44,271 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 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 14:07:44,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:07:44,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:44,298 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 14:07:44,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:44,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:44,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:07:46,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:46,462 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 14:07:46,462 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 14:07:46,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 14:07:47,110 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 259 [2021-06-05 14:07:48,316 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 375 [2021-06-05 14:07:48,566 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 404 [2021-06-05 14:07:48,817 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 404 [2021-06-05 14:07:49,117 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 394 [2021-06-05 14:07:49,389 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 391 [2021-06-05 14:07:49,540 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 302 [2021-06-05 14:07:49,750 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 266 [2021-06-05 14:07:49,938 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 271 [2021-06-05 14:07:50,555 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 249 [2021-06-05 14:07:50,678 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 259 [2021-06-05 14:07:51,251 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 331 [2021-06-05 14:07:52,237 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 258 [2021-06-05 14:07:52,399 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 280 [2021-06-05 14:07:52,792 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 299 [2021-06-05 14:07:53,192 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 478 [2021-06-05 14:07:53,703 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 504 [2021-06-05 14:07:54,353 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 804 DAG size of output: 581 [2021-06-05 14:07:54,995 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 804 DAG size of output: 581 [2021-06-05 14:07:55,671 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 809 DAG size of output: 559 [2021-06-05 14:07:56,239 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 561 [2021-06-05 14:07:57,291 WARN L205 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 465 [2021-06-05 14:07:58,028 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 355 [2021-06-05 14:07:58,296 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 370 [2021-06-05 14:07:58,584 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 378 [2021-06-05 14:07:58,832 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 378 [2021-06-05 14:07:59,126 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 360 [2021-06-05 14:07:59,609 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 291 [2021-06-05 14:08:00,209 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 229 [2021-06-05 14:08:00,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:08:00,975 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 14:08:00,975 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 14:08:00,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 14:08:03,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:08:03,398 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:08:03,398 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:08:03,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:08:04,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:08:04,745 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 14:08:04,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:08:04,746 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 14:08:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:04,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400349414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:04,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:04,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 14:08:04,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483274759] [2021-06-05 14:08:04,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:08:04,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:04,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:08:04,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:04,773 INFO L87 Difference]: Start difference. First operand 941 states and 3059 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:05,347 INFO L93 Difference]: Finished difference Result 1081 states and 3355 transitions. [2021-06-05 14:08:05,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:08:05,347 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:08:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:05,349 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 14:08:05,349 INFO L226 Difference]: Without dead ends: 1055 [2021-06-05 14:08:05,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 439.4ms TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:08:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-06-05 14:08:05,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 947. [2021-06-05 14:08:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.251585623678647) internal successors, (3076), 946 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3076 transitions. [2021-06-05 14:08:05,361 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3076 transitions. Word has length 20 [2021-06-05 14:08:05,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:05,361 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3076 transitions. [2021-06-05 14:08:05,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3076 transitions. [2021-06-05 14:08:05,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:08:05,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:05,362 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:05,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19257,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:05,563 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:05,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:05,563 INFO L82 PathProgramCache]: Analyzing trace with hash -734658873, now seen corresponding path program 205 times [2021-06-05 14:08:05,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:05,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100901382] [2021-06-05 14:08:05,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:05,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:05,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100901382] [2021-06-05 14:08:05,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100901382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:05,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979845458] [2021-06-05 14:08:05,662 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 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 14:08:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:05,689 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 14:08:05,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:06,000 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1189 DAG size of output: 49 [2021-06-05 14:08:06,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:06,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:06,737 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 246 [2021-06-05 14:08:06,845 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 256 [2021-06-05 14:08:07,730 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 254 [2021-06-05 14:08:07,858 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 254 [2021-06-05 14:08:08,005 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 262 [2021-06-05 14:08:08,148 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 253 [2021-06-05 14:08:08,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:08,972 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 14:08:08,973 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 14:08:08,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 14:08:10,073 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 315 [2021-06-05 14:08:10,270 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 331 [2021-06-05 14:08:10,472 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 331 [2021-06-05 14:08:10,710 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 341 [2021-06-05 14:08:11,161 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 439 [2021-06-05 14:08:11,570 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 423 [2021-06-05 14:08:11,792 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 343 [2021-06-05 14:08:11,956 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 295 [2021-06-05 14:08:12,080 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 255 [2021-06-05 14:08:13,572 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 231 [2021-06-05 14:08:13,801 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 291 [2021-06-05 14:08:14,074 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 320 [2021-06-05 14:08:14,441 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 374 [2021-06-05 14:08:14,923 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 417 [2021-06-05 14:08:15,119 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 294 [2021-06-05 14:08:16,217 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 242 [2021-06-05 14:08:16,935 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 220 [2021-06-05 14:08:17,224 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 330 [2021-06-05 14:08:17,585 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 402 [2021-06-05 14:08:18,043 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 432 [2021-06-05 14:08:18,632 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 646 DAG size of output: 497 [2021-06-05 14:08:19,825 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 924 DAG size of output: 729 [2021-06-05 14:08:21,327 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 1058 DAG size of output: 857 [2021-06-05 14:08:21,687 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 348 [2021-06-05 14:08:21,881 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 302 [2021-06-05 14:08:22,060 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 265 [2021-06-05 14:08:22,163 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 228 [2021-06-05 14:08:22,883 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 232 [2021-06-05 14:08:23,012 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 239 [2021-06-05 14:08:23,627 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 188 [2021-06-05 14:08:23,866 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 298 [2021-06-05 14:08:24,187 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 349 [2021-06-05 14:08:24,418 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 298 [2021-06-05 14:08:24,541 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 248 [2021-06-05 14:08:24,682 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 233 [2021-06-05 14:08:25,627 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 262 [2021-06-05 14:08:26,577 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 226 [2021-06-05 14:08:26,752 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 280 [2021-06-05 14:08:26,970 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 287 [2021-06-05 14:08:27,376 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 406 [2021-06-05 14:08:27,944 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 482 [2021-06-05 14:08:28,938 WARN L205 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 671 [2021-06-05 14:08:30,239 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 981 DAG size of output: 787 [2021-06-05 14:08:33,473 WARN L205 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 1718 DAG size of output: 1383 [2021-06-05 14:08:34,142 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 426 [2021-06-05 14:08:34,372 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 351 [2021-06-05 14:08:34,549 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 304 [2021-06-05 14:08:34,676 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 264 [2021-06-05 14:08:34,779 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 227 [2021-06-05 14:08:35,604 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 222 [2021-06-05 14:08:35,776 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 245 [2021-06-05 14:08:36,619 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 250 [2021-06-05 14:08:36,781 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 257 [2021-06-05 14:08:37,135 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 344 [2021-06-05 14:08:37,612 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 390 [2021-06-05 14:08:37,829 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 300 [2021-06-05 14:08:37,953 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 250 [2021-06-05 14:08:38,171 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 218 [2021-06-05 14:08:38,819 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 243 [2021-06-05 14:08:38,998 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 262 [2021-06-05 14:08:39,222 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 330 [2021-06-05 14:08:39,328 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 266 [2021-06-05 14:08:39,472 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 262 [2021-06-05 14:08:40,499 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 245 [2021-06-05 14:08:40,729 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 310 [2021-06-05 14:08:41,040 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 389 [2021-06-05 14:08:41,637 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 540 [2021-06-05 14:08:42,420 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 622 [2021-06-05 14:08:43,816 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 1030 DAG size of output: 835 [2021-06-05 14:08:45,574 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 1173 DAG size of output: 953 [2021-06-05 14:08:45,796 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 346 [2021-06-05 14:08:45,956 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 297 [2021-06-05 14:08:46,687 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 256 [2021-06-05 14:08:46,866 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 289 [2021-06-05 14:08:47,559 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 262 [2021-06-05 14:08:48,158 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 329 [2021-06-05 14:08:48,430 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 378 [2021-06-05 14:08:48,861 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 410 [2021-06-05 14:08:49,498 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 656 DAG size of output: 560 [2021-06-05 14:08:50,329 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 595 [2021-06-05 14:08:50,466 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 254 [2021-06-05 14:08:51,328 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 233 [2021-06-05 14:08:51,915 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 210 [2021-06-05 14:08:52,147 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 319 [2021-06-05 14:08:52,454 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 373 [2021-06-05 14:08:52,849 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 401 [2021-06-05 14:08:53,335 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 439 [2021-06-05 14:08:54,732 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 1076 DAG size of output: 887 [2021-06-05 14:08:56,467 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 1212 DAG size of output: 1004 [2021-06-05 14:09:00,514 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 1979 DAG size of output: 1641 [2021-06-05 14:09:08,891 WARN L205 SmtUtils]: Spent 8.37 s on a formula simplification. DAG size of input: 3193 DAG size of output: 2569 [2021-06-05 14:09:17,251 WARN L205 SmtUtils]: Spent 8.34 s on a formula simplification. DAG size of input: 3193 DAG size of output: 2569 [2021-06-05 14:09:27,123 WARN L205 SmtUtils]: Spent 9.86 s on a formula simplification. DAG size of input: 3202 DAG size of output: 2270 [2021-06-05 14:09:44,029 WARN L205 SmtUtils]: Spent 16.89 s on a formula simplification. DAG size of input: 2272 DAG size of output: 2759 [2021-06-05 14:09:45,584 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 1300 DAG size of output: 1279 [2021-06-05 14:09:48,786 WARN L205 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 829 DAG size of output: 1038 [2021-06-05 14:09:49,863 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 566 DAG size of output: 530 [2021-06-05 14:09:50,173 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 399 [2021-06-05 14:09:50,276 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 199 [2021-06-05 14:09:50,968 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 252 [2021-06-05 14:09:51,283 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 245 [2021-06-05 14:09:52,101 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 213 [2021-06-05 14:09:52,311 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 263 [2021-06-05 14:09:52,560 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 282 [2021-06-05 14:09:53,064 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 350 [2021-06-05 14:09:54,025 WARN L205 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 1044 DAG size of output: 557 [2021-06-05 14:09:54,329 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 521 [2021-06-05 14:09:54,967 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 459 [2021-06-05 14:09:55,328 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 269 [2021-06-05 14:09:55,540 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 303 [2021-06-05 14:09:55,769 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 275 [2021-06-05 14:09:56,073 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 218 [2021-06-05 14:09:56,398 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 397 [2021-06-05 14:09:57,885 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 1554 DAG size of output: 803 [2021-06-05 14:10:03,178 WARN L205 SmtUtils]: Spent 5.29 s on a formula simplification. DAG size of input: 3037 DAG size of output: 1686 [2021-06-05 14:10:08,681 WARN L205 SmtUtils]: Spent 5.49 s on a formula simplification. DAG size of input: 3037 DAG size of output: 1686 [2021-06-05 14:10:14,245 WARN L205 SmtUtils]: Spent 5.56 s on a formula simplification. DAG size of input: 3039 DAG size of output: 1662 [2021-06-05 14:10:14,697 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 1662 DAG size of output: 1662 [2021-06-05 14:10:14,858 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 781 DAG size of output: 781 [2021-06-05 14:10:15,155 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 298 [2021-06-05 14:10:16,577 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 188 [2021-06-05 14:10:16,727 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 207 [2021-06-05 14:10:17,046 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 251 [2021-06-05 14:10:17,362 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 375 [2021-06-05 14:10:18,279 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 263 [2021-06-05 14:10:18,793 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 794 DAG size of output: 508 [2021-06-05 14:10:21,671 WARN L205 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 986 DAG size of output: 1338 [2021-06-05 14:10:22,205 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 749 [2021-06-05 14:10:22,629 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 305 [2021-06-05 14:10:23,553 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 211 [2021-06-05 14:10:24,459 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 224 [2021-06-05 14:10:24,596 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 229 [2021-06-05 14:10:25,071 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 484 [2021-06-05 14:10:25,466 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 231 [2021-06-05 14:10:25,809 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 217 [2021-06-05 14:10:26,094 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 321 [2021-06-05 14:10:26,572 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 399 [2021-06-05 14:10:26,933 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 686 [2021-06-05 14:10:27,210 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 361 [2021-06-05 14:10:28,127 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 224 [2021-06-05 14:10:28,599 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 403 [2021-06-05 14:10:29,647 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 281 [2021-06-05 14:10:29,780 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 249 [2021-06-05 14:10:30,373 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 347 [2021-06-05 14:10:30,786 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 415 [2021-06-05 14:10:31,741 WARN L205 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 1350 DAG size of output: 700 [2021-06-05 14:10:33,396 WARN L205 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 2054 DAG size of output: 1054 [2021-06-05 14:10:35,047 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 2054 DAG size of output: 1054 [2021-06-05 14:10:36,218 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 2056 DAG size of output: 695 [2021-06-05 14:10:37,303 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 697 DAG size of output: 852 [2021-06-05 14:10:37,427 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 214 [2021-06-05 14:10:38,185 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 622 DAG size of output: 541 [2021-06-05 14:10:38,566 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 313 [2021-06-05 14:10:38,896 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 380 [2021-06-05 14:10:39,240 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 380 [2021-06-05 14:10:39,628 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 371 [2021-06-05 14:10:39,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:10:40,249 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 14:10:40,249 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 14:10:40,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 14:10:41,006 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 298 [2021-06-05 14:10:41,147 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 312 [2021-06-05 14:10:41,297 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 312 [2021-06-05 14:10:41,455 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 312 [2021-06-05 14:10:41,701 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 396 [2021-06-05 14:10:41,837 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 309 [2021-06-05 14:10:42,986 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 239 [2021-06-05 14:10:43,176 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 308 [2021-06-05 14:10:44,331 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 308 [2021-06-05 14:10:45,225 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 447 [2021-06-05 14:10:45,597 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 721 DAG size of output: 505 [2021-06-05 14:10:46,268 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 1067 DAG size of output: 653 [2021-06-05 14:10:46,382 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 256 [2021-06-05 14:10:47,130 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 238 [2021-06-05 14:10:47,320 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 315 [2021-06-05 14:10:47,551 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 343 [2021-06-05 14:10:48,167 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 245 [2021-06-05 14:10:48,304 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 271 [2021-06-05 14:10:48,758 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 495 [2021-06-05 14:10:49,369 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 250 [2021-06-05 14:10:49,521 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 278 [2021-06-05 14:10:50,240 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 383 [2021-06-05 14:10:50,529 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 406 [2021-06-05 14:10:51,385 WARN L205 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 740 [2021-06-05 14:10:52,697 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 257 [2021-06-05 14:10:52,870 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 302 [2021-06-05 14:10:53,189 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 450 [2021-06-05 14:10:53,575 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 489 [2021-06-05 14:10:54,572 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 322 [2021-06-05 14:10:54,801 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 351 [2021-06-05 14:10:55,024 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 378 [2021-06-05 14:10:55,771 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 913 DAG size of output: 704 [2021-06-05 14:10:57,592 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 1540 DAG size of output: 1209 [2021-06-05 14:11:00,570 WARN L205 SmtUtils]: Spent 2.97 s on a formula simplification. DAG size of input: 2433 DAG size of output: 1679 [2021-06-05 14:11:04,082 WARN L205 SmtUtils]: Spent 3.50 s on a formula simplification. DAG size of input: 2445 DAG size of output: 1690 [2021-06-05 14:11:07,537 WARN L205 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 2445 DAG size of output: 1690 [2021-06-05 14:11:11,067 WARN L205 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 2450 DAG size of output: 1487 [2021-06-05 14:11:16,162 WARN L205 SmtUtils]: Spent 5.09 s on a formula simplification. DAG size of input: 1489 DAG size of output: 1519 [2021-06-05 14:11:16,422 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 1328 DAG size of output: 1328 [2021-06-05 14:11:16,569 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 1317 [2021-06-05 14:11:17,440 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 474 [2021-06-05 14:11:18,397 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 349 [2021-06-05 14:11:18,558 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 366 [2021-06-05 14:11:18,848 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 389 [2021-06-05 14:11:19,148 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 487 [2021-06-05 14:11:19,602 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 1443 DAG size of output: 594 [2021-06-05 14:11:20,154 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 1486 DAG size of output: 610 [2021-06-05 14:11:20,870 WARN L205 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 684 [2021-06-05 14:11:21,576 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 684 [2021-06-05 14:11:22,415 WARN L205 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 1705 DAG size of output: 683 [2021-06-05 14:11:22,933 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 451 [2021-06-05 14:11:23,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:11:24,229 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:11:24,230 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:11:24,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:11:24,905 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 316 [2021-06-05 14:11:25,042 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 329 [2021-06-05 14:11:25,210 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 341 [2021-06-05 14:11:25,378 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 341 [2021-06-05 14:11:25,592 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 331 [2021-06-05 14:11:25,821 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 381 [2021-06-05 14:11:26,056 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 361 [2021-06-05 14:11:26,216 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 306 [2021-06-05 14:11:26,455 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 287 [2021-06-05 14:11:26,796 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 298 [2021-06-05 14:11:27,135 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 351 [2021-06-05 14:11:27,349 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 311 [2021-06-05 14:11:27,709 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 285 [2021-06-05 14:11:27,950 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 285 [2021-06-05 14:11:28,093 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 298 [2021-06-05 14:11:28,301 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 367 [2021-06-05 14:11:28,710 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 688 DAG size of output: 491 [2021-06-05 14:11:29,135 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 692 DAG size of output: 494 [2021-06-05 14:11:29,319 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 269 [2021-06-05 14:11:29,431 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 226 [2021-06-05 14:11:29,570 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 199 [2021-06-05 14:11:30,684 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 292 [2021-06-05 14:11:31,367 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 652 [2021-06-05 14:11:32,055 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 652 [2021-06-05 14:11:32,827 WARN L205 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 985 DAG size of output: 651 [2021-06-05 14:11:33,692 WARN L205 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 653 DAG size of output: 691 [2021-06-05 14:11:35,111 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 234 [2021-06-05 14:11:35,450 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 321 [2021-06-05 14:11:36,147 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 621 [2021-06-05 14:11:36,958 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 211 [2021-06-05 14:11:37,373 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 284 [2021-06-05 14:11:37,623 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 289 [2021-06-05 14:11:38,341 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 708 DAG size of output: 396 [2021-06-05 14:11:38,768 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 466 [2021-06-05 14:11:39,192 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 466 [2021-06-05 14:11:39,675 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 1031 DAG size of output: 465 [2021-06-05 14:11:39,822 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 278 [2021-06-05 14:11:39,960 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 285 [2021-06-05 14:11:40,254 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:11:40,272 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 14:11:40,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:11:40,273 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 14:11:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:40,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979845458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:40,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:40,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 14:11:40,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079506176] [2021-06-05 14:11:40,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:11:40,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:40,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:11:40,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:11:40,300 INFO L87 Difference]: Start difference. First operand 947 states and 3076 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:40,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:40,714 INFO L93 Difference]: Finished difference Result 1018 states and 3228 transitions. [2021-06-05 14:11:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:11:40,714 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:11:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:40,716 INFO L225 Difference]: With dead ends: 1018 [2021-06-05 14:11:40,716 INFO L226 Difference]: Without dead ends: 1008 [2021-06-05 14:11:40,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 428.5ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:11:40,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-06-05 14:11:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 951. [2021-06-05 14:11:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.2505263157894735) internal successors, (3088), 950 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:40,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3088 transitions. [2021-06-05 14:11:40,727 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3088 transitions. Word has length 20 [2021-06-05 14:11:40,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:40,728 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 3088 transitions. [2021-06-05 14:11:40,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:40,728 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3088 transitions. [2021-06-05 14:11:40,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:11:40,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:40,729 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:40,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20630 [2021-06-05 14:11:40,945 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash 754746123, now seen corresponding path program 206 times [2021-06-05 14:11:40,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:40,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442589191] [2021-06-05 14:11:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:41,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:41,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442589191] [2021-06-05 14:11:41,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442589191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:41,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321451435] [2021-06-05 14:11:41,040 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 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 14:11:41,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:41,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:41,064 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 14:11:41,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:41,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:11:41,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:11:42,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:11:42,528 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 14:11:42,529 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 14:11:42,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 14:11:43,185 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 268 [2021-06-05 14:11:43,336 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 311 [2021-06-05 14:11:44,018 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 200 [2021-06-05 14:11:44,133 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 219 [2021-06-05 14:11:44,308 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 280 [2021-06-05 14:11:44,452 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 310 [2021-06-05 14:11:44,565 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 246 [2021-06-05 14:11:45,590 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 264 [2021-06-05 14:11:45,802 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 284 [2021-06-05 14:11:46,038 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 307 [2021-06-05 14:11:46,405 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 430 [2021-06-05 14:11:46,960 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 458 [2021-06-05 14:11:47,509 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 458 [2021-06-05 14:11:48,183 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 663 DAG size of output: 466 [2021-06-05 14:11:48,607 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 328 [2021-06-05 14:11:49,386 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 190 [2021-06-05 14:11:49,551 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 217 [2021-06-05 14:11:49,792 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 184 [2021-06-05 14:11:50,219 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 190 [2021-06-05 14:11:51,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:11:51,414 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 14:11:51,415 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 14:11:51,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 14:11:52,779 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 263 [2021-06-05 14:11:52,963 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 285 [2021-06-05 14:11:54,217 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 252 [2021-06-05 14:11:54,638 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 424 [2021-06-05 14:11:55,871 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 266 [2021-06-05 14:11:56,828 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 291 [2021-06-05 14:11:57,216 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 429 [2021-06-05 14:11:58,130 WARN L205 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 1007 DAG size of output: 696 [2021-06-05 14:11:59,237 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 1051 DAG size of output: 720 [2021-06-05 14:12:00,529 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 1093 DAG size of output: 752 [2021-06-05 14:12:01,840 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 1093 DAG size of output: 752 [2021-06-05 14:12:02,981 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 1098 DAG size of output: 513 [2021-06-05 14:12:03,084 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 513 [2021-06-05 14:12:03,381 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 458 [2021-06-05 14:12:03,618 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 276 [2021-06-05 14:12:03,861 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 129 [2021-06-05 14:12:04,290 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 243 [2021-06-05 14:12:04,437 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 267 [2021-06-05 14:12:04,595 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 267 [2021-06-05 14:12:04,775 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 271 [2021-06-05 14:12:04,959 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 280 [2021-06-05 14:12:05,084 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 193 [2021-06-05 14:12:05,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:12:05,866 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:12:05,866 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:12:05,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:12:07,051 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 230 [2021-06-05 14:12:07,209 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 277 [2021-06-05 14:12:08,028 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 243 [2021-06-05 14:12:08,355 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 426 [2021-06-05 14:12:08,670 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 426 [2021-06-05 14:12:09,063 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 430 [2021-06-05 14:12:09,397 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 422 [2021-06-05 14:12:10,085 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:12:10,103 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 14:12:10,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:12:10,104 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 14:12:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:10,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321451435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:10,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:10,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 14:12:10,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824648741] [2021-06-05 14:12:10,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:12:10,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:10,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:12:10,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:12:10,131 INFO L87 Difference]: Start difference. First operand 951 states and 3088 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:10,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:10,624 INFO L93 Difference]: Finished difference Result 1044 states and 3286 transitions. [2021-06-05 14:12:10,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:12:10,624 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:12:10,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:10,626 INFO L225 Difference]: With dead ends: 1044 [2021-06-05 14:12:10,626 INFO L226 Difference]: Without dead ends: 1034 [2021-06-05 14:12:10,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 445.4ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:12:10,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-05 14:12:10,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 951. [2021-06-05 14:12:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.2505263157894735) internal successors, (3088), 950 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3088 transitions. [2021-06-05 14:12:10,640 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3088 transitions. Word has length 20 [2021-06-05 14:12:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:10,640 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 3088 transitions. [2021-06-05 14:12:10,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3088 transitions. [2021-06-05 14:12:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:12:10,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:10,642 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:10,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28098 [2021-06-05 14:12:10,857 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:10,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:10,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1412276551, now seen corresponding path program 207 times [2021-06-05 14:12:10,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:10,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487726177] [2021-06-05 14:12:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:10,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:10,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487726177] [2021-06-05 14:12:10,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487726177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:10,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031200213] [2021-06-05 14:12:10,953 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 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 14:12:10,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:12:10,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:10,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 14:12:10,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:11,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:11,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:12:12,073 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 316 [2021-06-05 14:12:12,245 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 277 [2021-06-05 14:12:12,398 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 274 [2021-06-05 14:12:13,604 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 272 [2021-06-05 14:12:13,737 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 266 [2021-06-05 14:12:13,919 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 330 [2021-06-05 14:12:14,198 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 433 [2021-06-05 14:12:14,556 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 736 DAG size of output: 517 [2021-06-05 14:12:14,759 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 216 [2021-06-05 14:12:15,615 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 321 [2021-06-05 14:12:15,807 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 339 [2021-06-05 14:12:16,485 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 1144 DAG size of output: 744 [2021-06-05 14:12:17,151 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 1144 DAG size of output: 744 [2021-06-05 14:12:17,885 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 1149 DAG size of output: 749 [2021-06-05 14:12:18,308 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 513 [2021-06-05 14:12:18,450 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 281 [2021-06-05 14:12:19,126 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 477 [2021-06-05 14:12:19,812 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 282 [2021-06-05 14:12:20,311 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 258 [2021-06-05 14:12:20,506 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 324 [2021-06-05 14:12:20,682 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 324 [2021-06-05 14:12:20,876 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 328 [2021-06-05 14:12:21,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:12:21,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:21,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:12:21,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:12:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:21,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031200213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:21,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:21,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 14:12:21,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618112757] [2021-06-05 14:12:21,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:12:21,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:21,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:12:21,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:12:21,189 INFO L87 Difference]: Start difference. First operand 951 states and 3088 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:21,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:21,719 INFO L93 Difference]: Finished difference Result 1074 states and 3428 transitions. [2021-06-05 14:12:21,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:12:21,720 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:12:21,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:21,721 INFO L225 Difference]: With dead ends: 1074 [2021-06-05 14:12:21,721 INFO L226 Difference]: Without dead ends: 1058 [2021-06-05 14:12:21,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:12:21,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-05 14:12:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1006. [2021-06-05 14:12:21,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.261691542288557) internal successors, (3278), 1005 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3278 transitions. [2021-06-05 14:12:21,731 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3278 transitions. Word has length 20 [2021-06-05 14:12:21,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:21,732 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3278 transitions. [2021-06-05 14:12:21,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:21,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3278 transitions. [2021-06-05 14:12:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:12:21,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:21,733 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:21,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29718,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:21,934 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:21,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:21,934 INFO L82 PathProgramCache]: Analyzing trace with hash -553402021, now seen corresponding path program 208 times [2021-06-05 14:12:21,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:21,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254579329] [2021-06-05 14:12:21,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:22,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:22,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254579329] [2021-06-05 14:12:22,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254579329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:22,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500930143] [2021-06-05 14:12:22,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:12:22,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:12:22,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:22,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 14:12:22,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:22,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:22,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:12:23,153 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 290 [2021-06-05 14:12:23,452 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 274 [2021-06-05 14:12:24,397 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 292 [2021-06-05 14:12:25,236 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 414 [2021-06-05 14:12:25,425 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 414 [2021-06-05 14:12:25,650 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 729 DAG size of output: 418 [2021-06-05 14:12:26,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:12:26,898 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 14:12:26,899 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 14:12:26,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 14:12:27,557 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 291 [2021-06-05 14:12:28,490 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 297 [2021-06-05 14:12:28,723 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 362 [2021-06-05 14:12:28,944 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 362 [2021-06-05 14:12:29,201 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 345 [2021-06-05 14:12:29,662 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 363 [2021-06-05 14:12:29,844 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 242 [2021-06-05 14:12:30,144 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 243 [2021-06-05 14:12:30,538 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 275 [2021-06-05 14:12:30,696 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 275 [2021-06-05 14:12:30,878 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 280 [2021-06-05 14:12:31,036 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 272 [2021-06-05 14:12:31,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:12:32,234 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 14:12:32,235 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 14:12:32,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 14:12:32,948 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 238 [2021-06-05 14:12:33,078 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 246 [2021-06-05 14:12:33,207 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 311 [2021-06-05 14:12:33,377 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 307 [2021-06-05 14:12:33,489 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 260 [2021-06-05 14:12:33,641 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 278 [2021-06-05 14:12:34,213 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 331 [2021-06-05 14:12:35,241 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 344 [2021-06-05 14:12:35,557 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 639 DAG size of output: 487 [2021-06-05 14:12:35,937 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 527 [2021-06-05 14:12:36,499 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 791 DAG size of output: 555 [2021-06-05 14:12:36,910 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 791 DAG size of output: 555 [2021-06-05 14:12:37,420 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 802 DAG size of output: 565 [2021-06-05 14:12:37,620 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 670 [2021-06-05 14:12:38,095 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 419 [2021-06-05 14:12:38,198 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 215 [2021-06-05 14:12:38,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:12:39,186 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:12:39,186 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:12:39,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:12:40,300 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 258 [2021-06-05 14:12:40,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:12:40,981 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 14:12:40,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:12:40,982 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 14:12:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:41,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500930143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:41,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:41,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 14:12:41,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443299448] [2021-06-05 14:12:41,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:12:41,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:41,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:12:41,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:12:41,009 INFO L87 Difference]: Start difference. First operand 1006 states and 3278 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:41,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:41,690 INFO L93 Difference]: Finished difference Result 1179 states and 3670 transitions. [2021-06-05 14:12:41,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:12:41,690 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:12:41,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:41,692 INFO L225 Difference]: With dead ends: 1179 [2021-06-05 14:12:41,692 INFO L226 Difference]: Without dead ends: 1153 [2021-06-05 14:12:41,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 508.4ms TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:12:41,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-06-05 14:12:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1019. [2021-06-05 14:12:41,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.2652259332023577) internal successors, (3324), 1018 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3324 transitions. [2021-06-05 14:12:41,703 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3324 transitions. Word has length 20 [2021-06-05 14:12:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:41,703 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 3324 transitions. [2021-06-05 14:12:41,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3324 transitions. [2021-06-05 14:12:41,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:12:41,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:41,704 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:41,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30435,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:41,904 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:41,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:41,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1157211287, now seen corresponding path program 209 times [2021-06-05 14:12:41,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:41,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991164261] [2021-06-05 14:12:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:42,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:42,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991164261] [2021-06-05 14:12:42,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991164261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:42,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346789341] [2021-06-05 14:12:42,015 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 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 14:12:42,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:12:42,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:42,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 14:12:42,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:42,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:42,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:12:43,647 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 253 [2021-06-05 14:12:43,853 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 325 [2021-06-05 14:12:44,104 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 364 [2021-06-05 14:12:44,353 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 364 [2021-06-05 14:12:44,647 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 371 [2021-06-05 14:12:44,995 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 425 [2021-06-05 14:12:45,239 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 341 [2021-06-05 14:12:45,664 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 222 [2021-06-05 14:12:46,188 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 298 [2021-06-05 14:12:46,367 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 298 [2021-06-05 14:12:46,552 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 301 [2021-06-05 14:12:46,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:12:47,144 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 14:12:47,145 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 14:12:47,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 14:12:48,041 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 350 [2021-06-05 14:12:48,188 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 370 [2021-06-05 14:12:48,374 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 397 [2021-06-05 14:12:48,616 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 419 [2021-06-05 14:12:48,849 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 440 [2021-06-05 14:12:49,342 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 457 [2021-06-05 14:12:49,698 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 482 [2021-06-05 14:12:50,035 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 482 [2021-06-05 14:12:50,449 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 488 [2021-06-05 14:12:50,717 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 489 [2021-06-05 14:12:51,053 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 381 [2021-06-05 14:12:51,267 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 351 [2021-06-05 14:12:51,512 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 348 [2021-06-05 14:12:51,896 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 300 [2021-06-05 14:12:52,271 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 250 [2021-06-05 14:12:52,599 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 316 [2021-06-05 14:12:53,042 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 341 [2021-06-05 14:12:53,320 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 606 DAG size of output: 364 [2021-06-05 14:12:53,641 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 381 [2021-06-05 14:12:53,982 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 394 [2021-06-05 14:12:54,371 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 418 [2021-06-05 14:12:54,824 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 429 [2021-06-05 14:12:55,275 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 429 [2021-06-05 14:12:55,813 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 692 DAG size of output: 430 [2021-06-05 14:12:56,718 WARN L205 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 468 [2021-06-05 14:12:57,143 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 425 [2021-06-05 14:12:57,431 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 356 [2021-06-05 14:12:57,660 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 349 [2021-06-05 14:12:57,866 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 334 [2021-06-05 14:12:58,518 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 230 [2021-06-05 14:12:58,648 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 238 [2021-06-05 14:12:58,815 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 250 [2021-06-05 14:12:59,016 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 261 [2021-06-05 14:12:59,193 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 286 [2021-06-05 14:12:59,449 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 287 [2021-06-05 14:12:59,601 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 275 [2021-06-05 14:12:59,727 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 210 [2021-06-05 14:13:00,706 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 317 [2021-06-05 14:13:01,063 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 317 [2021-06-05 14:13:01,382 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 276 [2021-06-05 14:13:01,917 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 299 [2021-06-05 14:13:02,166 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 263 [2021-06-05 14:13:02,782 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 203 [2021-06-05 14:13:02,950 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 233 [2021-06-05 14:13:03,116 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 233 [2021-06-05 14:13:03,278 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 206 [2021-06-05 14:13:03,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:13:04,087 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 14:13:04,087 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 14:13:04,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 14:13:05,260 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 442 [2021-06-05 14:13:05,478 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 442 [2021-06-05 14:13:05,733 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 370 [2021-06-05 14:13:06,142 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 473 [2021-06-05 14:13:06,417 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 292 [2021-06-05 14:13:07,419 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 504 DAG size of output: 308 [2021-06-05 14:13:07,982 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 567 [2021-06-05 14:13:08,330 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 350 [2021-06-05 14:13:09,316 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 282 [2021-06-05 14:13:09,488 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 292 [2021-06-05 14:13:09,724 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 365 [2021-06-05 14:13:10,118 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 958 DAG size of output: 456 [2021-06-05 14:13:10,511 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 958 DAG size of output: 456 [2021-06-05 14:13:10,960 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 968 DAG size of output: 445 [2021-06-05 14:13:11,430 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 589 [2021-06-05 14:13:11,812 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 460 [2021-06-05 14:13:12,045 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 232 [2021-06-05 14:13:12,884 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 268 [2021-06-05 14:13:13,193 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 405 [2021-06-05 14:13:13,488 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 405 [2021-06-05 14:13:13,830 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 635 DAG size of output: 382 [2021-06-05 14:13:14,074 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 346 [2021-06-05 14:13:14,884 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 215 [2021-06-05 14:13:15,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:13:15,335 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:13:15,335 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:13:15,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:13:16,776 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 272 [2021-06-05 14:13:16,918 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 311 [2021-06-05 14:13:17,405 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 585 DAG size of output: 358 [2021-06-05 14:13:17,679 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 408 [2021-06-05 14:13:17,940 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 408 [2021-06-05 14:13:18,252 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 648 DAG size of output: 414 [2021-06-05 14:13:18,447 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 451 [2021-06-05 14:13:18,657 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 340 [2021-06-05 14:13:19,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:13:19,258 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 14:13:19,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:13:19,259 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 14:13:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:19,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346789341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:19,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:19,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 14:13:19,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612339245] [2021-06-05 14:13:19,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:13:19,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:19,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:13:19,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:13:19,286 INFO L87 Difference]: Start difference. First operand 1019 states and 3324 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:19,780 INFO L93 Difference]: Finished difference Result 1092 states and 3484 transitions. [2021-06-05 14:13:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:13:19,781 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:13:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:19,782 INFO L225 Difference]: With dead ends: 1092 [2021-06-05 14:13:19,782 INFO L226 Difference]: Without dead ends: 1082 [2021-06-05 14:13:19,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:13:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-05 14:13:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1022. [2021-06-05 14:13:19,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-06-05 14:13:19,794 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-06-05 14:13:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:19,794 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-06-05 14:13:19,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-06-05 14:13:19,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:13:19,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:19,795 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:19,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31818,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:19,997 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:19,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:19,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1648351013, now seen corresponding path program 210 times [2021-06-05 14:13:19,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:19,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547931343] [2021-06-05 14:13:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:20,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:20,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547931343] [2021-06-05 14:13:20,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547931343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:20,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103159068] [2021-06-05 14:13:20,153 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 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 14:13:20,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:13:20,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:20,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 14:13:20,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:20,616 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:13:20,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:13:20,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:13:21,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:13:22,285 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 14:13:22,286 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 14:13:22,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 14:13:23,327 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 361 [2021-06-05 14:13:23,544 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 378 [2021-06-05 14:13:23,741 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 378 [2021-06-05 14:13:23,990 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 388 [2021-06-05 14:13:24,304 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 494 [2021-06-05 14:13:24,519 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 378 [2021-06-05 14:13:24,936 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 256 [2021-06-05 14:13:25,355 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 267 [2021-06-05 14:13:25,525 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 316 [2021-06-05 14:13:25,659 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 301 [2021-06-05 14:13:26,275 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 236 [2021-06-05 14:13:26,508 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 231 [2021-06-05 14:13:26,769 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 345 [2021-06-05 14:13:27,014 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 345 [2021-06-05 14:13:27,310 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 353 [2021-06-05 14:13:27,454 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 356 [2021-06-05 14:13:27,762 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 395 [2021-06-05 14:13:27,941 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 352 [2021-06-05 14:13:29,363 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 273 [2021-06-05 14:13:29,561 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 294 [2021-06-05 14:13:29,826 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 343 [2021-06-05 14:13:30,160 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 355 [2021-06-05 14:13:30,476 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 355 [2021-06-05 14:13:30,793 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 327 [2021-06-05 14:13:31,215 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 407 [2021-06-05 14:13:31,638 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 286 [2021-06-05 14:13:31,821 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 266 [2021-06-05 14:13:32,561 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 229 [2021-06-05 14:13:32,813 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 319 [2021-06-05 14:13:33,065 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 319 [2021-06-05 14:13:33,344 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 318 [2021-06-05 14:13:33,719 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 371 [2021-06-05 14:13:33,853 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 293 [2021-06-05 14:13:34,648 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 309 [2021-06-05 14:13:34,838 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 357 [2021-06-05 14:13:35,038 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 357 [2021-06-05 14:13:35,262 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 362 [2021-06-05 14:13:35,457 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 265 [2021-06-05 14:13:35,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:13:36,181 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-06-05 14:13:36,182 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-06-05 14:13:36,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-06-05 14:13:36,792 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 249 [2021-06-05 14:13:36,938 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 288 [2021-06-05 14:13:37,817 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 239 [2021-06-05 14:13:37,944 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 239 [2021-06-05 14:13:38,097 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 217 [2021-06-05 14:13:38,222 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 267 [2021-06-05 14:13:39,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:13:39,522 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:13:39,522 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:13:39,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:13:40,761 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 219 [2021-06-05 14:13:41,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:13:41,479 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-06-05 14:13:41,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:13:41,480 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-06-05 14:13:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:41,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103159068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:41,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:41,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 14:13:41,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199302295] [2021-06-05 14:13:41,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 14:13:41,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:41,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 14:13:41,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:13:41,507 INFO L87 Difference]: Start difference. First operand 1022 states and 3333 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:41,981 INFO L93 Difference]: Finished difference Result 1112 states and 3526 transitions. [2021-06-05 14:13:41,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:13:41,981 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:13:41,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:41,983 INFO L225 Difference]: With dead ends: 1112 [2021-06-05 14:13:41,983 INFO L226 Difference]: Without dead ends: 1102 [2021-06-05 14:13:41,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 568.6ms TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:13:41,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-06-05 14:13:41,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1022. [2021-06-05 14:13:41,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:41,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-06-05 14:13:41,994 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-06-05 14:13:41,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:41,994 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-06-05 14:13:41,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:41,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-06-05 14:13:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:13:41,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:41,995 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:42,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34189 [2021-06-05 14:13:42,196 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:42,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:42,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1573530903, now seen corresponding path program 211 times [2021-06-05 14:13:42,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:42,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793246155] [2021-06-05 14:13:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:42,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:42,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793246155] [2021-06-05 14:13:42,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793246155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:42,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274745835] [2021-06-05 14:13:42,292 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 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 14:13:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:42,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 14:13:42,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:42,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:13:42,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:13:43,416 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 249 [2021-06-05 14:13:43,533 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 260 [2021-06-05 14:13:43,795 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 351 [2021-06-05 14:13:43,907 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 265 [2021-06-05 14:13:44,072 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 253 [2021-06-05 14:13:45,058 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 361 [2021-06-05 14:13:45,279 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 390 [2021-06-05 14:13:45,543 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 434 [2021-06-05 14:13:45,748 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 286 [2021-06-05 14:13:46,835 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 249 [2021-06-05 14:13:46,950 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 244 [2021-06-05 14:13:47,131 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 289 [2021-06-05 14:13:47,343 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 372 [2021-06-05 14:13:47,917 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 1157 DAG size of output: 652 [2021-06-05 14:13:48,612 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 1229 DAG size of output: 708 [2021-06-05 14:13:49,299 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 1229 DAG size of output: 708 [2021-06-05 14:13:50,070 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 1236 DAG size of output: 715 [2021-06-05 14:13:51,561 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 717 DAG size of output: 423 [2021-06-05 14:13:52,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:13:52,806 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-06-05 14:13:52,806 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-06-05 14:13:52,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-06-05 14:13:53,988 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 481 [2021-06-05 14:13:54,211 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 650 DAG size of output: 501 [2021-06-05 14:13:54,499 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 529 [2021-06-05 14:13:54,828 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 544 [2021-06-05 14:13:55,285 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 288 [2021-06-05 14:13:55,895 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 414 [2021-06-05 14:13:56,105 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 436 [2021-06-05 14:13:56,336 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 615 DAG size of output: 452 [2021-06-05 14:13:56,975 WARN L205 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 1163 DAG size of output: 819 [2021-06-05 14:13:57,595 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 1163 DAG size of output: 819 [2021-06-05 14:13:58,362 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 1177 DAG size of output: 807 [2021-06-05 14:13:59,442 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 809 DAG size of output: 994 [2021-06-05 14:14:00,369 WARN L205 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 881 [2021-06-05 14:14:01,012 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 638 DAG size of output: 648 [2021-06-05 14:14:01,247 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 566 [2021-06-05 14:14:01,560 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 414 [2021-06-05 14:14:01,716 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 388 [2021-06-05 14:14:01,903 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 369 [2021-06-05 14:14:02,613 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 268 [2021-06-05 14:14:03,285 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 281 [2021-06-05 14:14:03,486 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 300 [2021-06-05 14:14:03,845 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 367 [2021-06-05 14:14:04,443 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 690 DAG size of output: 551 [2021-06-05 14:14:05,298 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 677 [2021-06-05 14:14:06,725 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 259 [2021-06-05 14:14:07,009 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 320 [2021-06-05 14:14:07,397 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 397 [2021-06-05 14:14:07,870 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 418 [2021-06-05 14:14:08,500 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 507 [2021-06-05 14:14:10,205 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 1053 DAG size of output: 866 [2021-06-05 14:14:10,936 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 607 [2021-06-05 14:14:11,420 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 545 [2021-06-05 14:14:11,642 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 327 [2021-06-05 14:14:12,448 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 343 [2021-06-05 14:14:12,922 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 291 [2021-06-05 14:14:13,344 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 451 [2021-06-05 14:14:13,845 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 472 [2021-06-05 14:14:14,464 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 587 DAG size of output: 488 [2021-06-05 14:14:15,524 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 885 DAG size of output: 764 [2021-06-05 14:14:15,980 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 549 [2021-06-05 14:14:16,184 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 345 [2021-06-05 14:14:16,864 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 278 [2021-06-05 14:14:17,562 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 253 [2021-06-05 14:14:17,949 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 418 [2021-06-05 14:14:18,481 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 446 [2021-06-05 14:14:19,065 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 474 [2021-06-05 14:14:19,886 WARN L205 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 568 [2021-06-05 14:14:21,195 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 994 DAG size of output: 861 [2021-06-05 14:14:23,903 WARN L205 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 1302 DAG size of output: 1160 [2021-06-05 14:14:28,650 WARN L205 SmtUtils]: Spent 4.74 s on a formula simplification. DAG size of input: 1780 DAG size of output: 1685 [2021-06-05 14:14:28,891 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 348 [2021-06-05 14:14:29,222 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 375 [2021-06-05 14:14:29,432 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 333 [2021-06-05 14:14:29,743 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 349 [2021-06-05 14:14:30,336 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 270 [2021-06-05 14:14:30,527 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 327 [2021-06-05 14:14:30,701 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 287 [2021-06-05 14:14:31,216 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 327 [2021-06-05 14:14:31,594 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 477 [2021-06-05 14:14:32,044 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 495 [2021-06-05 14:14:32,751 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 552 [2021-06-05 14:14:33,737 WARN L205 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 747 DAG size of output: 634 [2021-06-05 14:14:34,093 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 359 [2021-06-05 14:14:34,271 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 316 [2021-06-05 14:14:34,392 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 276 [2021-06-05 14:14:34,554 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 283 [2021-06-05 14:14:34,801 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 250 [2021-06-05 14:14:35,007 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 359 [2021-06-05 14:14:35,410 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 593 DAG size of output: 503 [2021-06-05 14:14:35,889 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 525 [2021-06-05 14:14:36,483 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 533 [2021-06-05 14:14:36,960 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 259 [2021-06-05 14:14:37,085 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 267 [2021-06-05 14:14:37,957 WARN L205 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 677 DAG size of output: 587 [2021-06-05 14:14:40,096 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 996 DAG size of output: 805 [2021-06-05 14:14:40,218 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 256 [2021-06-05 14:14:40,429 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 265 [2021-06-05 14:14:41,578 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 264 [2021-06-05 14:14:41,912 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 304 [2021-06-05 14:14:42,449 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 238 [2021-06-05 14:14:42,664 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 257 [2021-06-05 14:14:42,799 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 273 [2021-06-05 14:14:42,970 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 281 [2021-06-05 14:14:43,558 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 426 [2021-06-05 14:14:45,889 WARN L205 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 1211 DAG size of output: 891 [2021-06-05 14:14:53,275 WARN L205 SmtUtils]: Spent 7.38 s on a formula simplification. DAG size of input: 2487 DAG size of output: 2146 [2021-06-05 14:14:54,218 WARN L205 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 675 DAG size of output: 716 [2021-06-05 14:14:54,440 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 369 [2021-06-05 14:14:54,756 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 395 [2021-06-05 14:14:55,080 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 382 [2021-06-05 14:14:55,313 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 370 [2021-06-05 14:14:55,547 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 342 [2021-06-05 14:14:56,048 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 267 [2021-06-05 14:14:56,208 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 275 [2021-06-05 14:14:56,483 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 428 [2021-06-05 14:14:56,984 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 586 [2021-06-05 14:14:57,242 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 353 [2021-06-05 14:14:57,517 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 352 [2021-06-05 14:14:58,193 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 325 [2021-06-05 14:14:58,568 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 470 [2021-06-05 14:14:59,609 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 813 DAG size of output: 755 [2021-06-05 14:14:59,782 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 343 [2021-06-05 14:15:00,032 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 363 [2021-06-05 14:15:00,544 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 273 [2021-06-05 14:15:00,667 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 332 [2021-06-05 14:15:01,056 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 270 [2021-06-05 14:15:01,302 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 429 [2021-06-05 14:15:01,638 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 455 [2021-06-05 14:15:02,196 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 549 [2021-06-05 14:15:02,978 WARN L205 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 731 DAG size of output: 649 [2021-06-05 14:15:03,995 WARN L205 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 765 DAG size of output: 671 [2021-06-05 14:15:06,354 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 1203 DAG size of output: 1037 [2021-06-05 14:15:06,472 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 255 [2021-06-05 14:15:06,630 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 266 [2021-06-05 14:15:07,187 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 254 [2021-06-05 14:15:07,340 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 262 [2021-06-05 14:15:07,446 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 242 [2021-06-05 14:15:07,956 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 246 [2021-06-05 14:15:08,096 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 254 [2021-06-05 14:15:08,307 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 283 [2021-06-05 14:15:08,708 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 364 [2021-06-05 14:15:08,904 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 264 [2021-06-05 14:15:09,493 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 247 [2021-06-05 14:15:09,628 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 268 [2021-06-05 14:15:10,377 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 274 [2021-06-05 14:15:10,723 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 369 [2021-06-05 14:15:11,170 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 409 [2021-06-05 14:15:12,191 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 721 DAG size of output: 540 [2021-06-05 14:15:15,288 WARN L205 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 1571 DAG size of output: 1210 [2021-06-05 14:15:15,460 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 563 [2021-06-05 14:15:16,350 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 270 [2021-06-05 14:15:16,485 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 285 [2021-06-05 14:15:17,155 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 278 [2021-06-05 14:15:17,329 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 301 [2021-06-05 14:15:17,698 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 377 [2021-06-05 14:15:18,195 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 453 [2021-06-05 14:15:18,808 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 261 [2021-06-05 14:15:18,935 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 281 [2021-06-05 14:15:19,650 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 350 [2021-06-05 14:15:20,027 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 432 [2021-06-05 14:15:20,536 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 483 [2021-06-05 14:15:21,160 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 506 [2021-06-05 14:15:22,441 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 856 DAG size of output: 678 [2021-06-05 14:15:22,665 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 385 [2021-06-05 14:15:22,867 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 399 [2021-06-05 14:15:23,575 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 312 [2021-06-05 14:15:24,088 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 208 [2021-06-05 14:15:24,287 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 247 [2021-06-05 14:15:24,773 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 458 [2021-06-05 14:15:25,380 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 476 [2021-06-05 14:15:26,189 WARN L205 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 620 [2021-06-05 14:15:26,387 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 379 [2021-06-05 14:15:27,136 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 306 [2021-06-05 14:15:27,585 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 221 [2021-06-05 14:15:27,764 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 258 [2021-06-05 14:15:28,218 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 470 [2021-06-05 14:15:28,855 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 584 [2021-06-05 14:15:29,697 WARN L205 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 729 [2021-06-05 14:15:30,685 WARN L205 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 807 DAG size of output: 756 [2021-06-05 14:15:32,742 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 1058 DAG size of output: 1016 [2021-06-05 14:15:36,339 WARN L205 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 1591 DAG size of output: 1440 [2021-06-05 14:15:40,493 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 1650 DAG size of output: 1493 [2021-06-05 14:15:45,350 WARN L205 SmtUtils]: Spent 4.85 s on a formula simplification. DAG size of input: 1836 DAG size of output: 1636 [2021-06-05 14:15:54,449 WARN L205 SmtUtils]: Spent 9.09 s on a formula simplification. DAG size of input: 2963 DAG size of output: 2563 [2021-06-05 14:16:12,617 WARN L205 SmtUtils]: Spent 18.14 s on a formula simplification. DAG size of input: 4614 DAG size of output: 4052 [2021-06-05 14:16:13,795 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 800 DAG size of output: 976 [2021-06-05 14:16:15,016 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 716 DAG size of output: 682 [2021-06-05 14:16:15,264 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 358 [2021-06-05 14:16:15,372 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 248 [2021-06-05 14:16:16,444 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 227 [2021-06-05 14:16:16,719 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 229 [2021-06-05 14:16:16,980 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 262 [2021-06-05 14:16:17,300 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 387 [2021-06-05 14:16:17,467 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 330 [2021-06-05 14:16:17,945 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 234 [2021-06-05 14:16:18,181 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 285 [2021-06-05 14:16:18,423 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 301 [2021-06-05 14:16:18,823 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 392 [2021-06-05 14:16:19,110 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 369 [2021-06-05 14:16:19,283 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 354 [2021-06-05 14:16:19,458 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 299 [2021-06-05 14:16:19,699 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 243 [2021-06-05 14:16:19,857 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 257 [2021-06-05 14:16:20,238 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 425 [2021-06-05 14:16:20,424 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 317 [2021-06-05 14:16:20,736 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 251 [2021-06-05 14:16:20,945 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 265 [2021-06-05 14:16:21,656 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 457 [2021-06-05 14:16:22,857 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 791 DAG size of output: 601 [2021-06-05 14:16:23,957 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 903 DAG size of output: 569 [2021-06-05 14:16:25,247 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 917 DAG size of output: 577 [2021-06-05 14:16:25,487 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 556 [2021-06-05 14:16:25,817 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 407 [2021-06-05 14:16:26,545 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 252 [2021-06-05 14:16:27,251 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 226 [2021-06-05 14:16:27,585 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 301 [2021-06-05 14:16:28,034 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 387 [2021-06-05 14:16:28,203 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 381 [2021-06-05 14:16:28,382 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 362 [2021-06-05 14:16:29,193 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 196 [2021-06-05 14:16:29,352 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 212 [2021-06-05 14:16:29,547 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 232 [2021-06-05 14:16:29,942 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 408 [2021-06-05 14:16:30,563 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 657 DAG size of output: 540 [2021-06-05 14:16:31,727 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 806 DAG size of output: 647 [2021-06-05 14:16:32,466 WARN L205 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 597 [2021-06-05 14:16:32,961 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 542 [2021-06-05 14:16:33,227 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 343 [2021-06-05 14:16:33,362 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 277 [2021-06-05 14:16:33,707 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 303 [2021-06-05 14:16:33,933 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 317 [2021-06-05 14:16:34,517 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 264 [2021-06-05 14:16:34,712 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 278 [2021-06-05 14:16:35,186 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 413 [2021-06-05 14:16:35,761 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 422 [2021-06-05 14:16:36,766 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 832 DAG size of output: 690 [2021-06-05 14:16:37,256 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 554 [2021-06-05 14:16:37,423 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 493 [2021-06-05 14:16:37,986 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 219 [2021-06-05 14:16:38,426 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 210 [2021-06-05 14:16:38,615 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 307 [2021-06-05 14:16:38,976 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 400 [2021-06-05 14:16:39,440 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 427 [2021-06-05 14:16:39,970 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 446 [2021-06-05 14:16:40,743 WARN L205 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 589 [2021-06-05 14:16:41,978 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 947 DAG size of output: 808 [2021-06-05 14:16:44,338 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 1252 DAG size of output: 1075 Received shutdown request... [2021-06-05 14:16:48,176 WARN L205 SmtUtils]: Spent 3.83 s on a formula simplification. DAG size of input: 1464 DAG size of output: 1303 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown