/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:13:23,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:13:23,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:13:23,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:13:23,094 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-12 19:13:23,122 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:13:23,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:13:23,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:13:23,122 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:13:23,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:13:23,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:13:23,125 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:13:23,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:13:23,125 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:13:23,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:13:23,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:13:23,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:13:23,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:13:23,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:13:23,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:13:23,126 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:13:23,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:13:23,126 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:13:23,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:13:23,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:13:23,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:13:23,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:13:23,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:13:23,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:13:23,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:13:23,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:13:23,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:13:23,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:13:23,127 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:13:23,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:13:23,128 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:13:23,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:13:23,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:13:23,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:13:23,369 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:13:23,369 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:13:23,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl [2021-08-12 19:13:23,370 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl' [2021-08-12 19:13:23,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:13:23,415 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:13:23,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:13:23,417 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:13:23,417 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:13:23,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:13:23" (1/1) ... [2021-08-12 19:13:23,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:13:23" (1/1) ... [2021-08-12 19:13:23,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:13:23,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:13:23,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:13:23,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:13:23,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:13:23" (1/1) ... [2021-08-12 19:13:23,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:13:23" (1/1) ... [2021-08-12 19:13:23,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:13:23" (1/1) ... [2021-08-12 19:13:23,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:13:23" (1/1) ... [2021-08-12 19:13:23,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:13:23" (1/1) ... [2021-08-12 19:13:23,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:13:23" (1/1) ... [2021-08-12 19:13:23,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:13:23" (1/1) ... [2021-08-12 19:13:23,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:13:23,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:13:23,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:13:23,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:13:23,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:13:23" (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 [2021-08-12 19:13:23,530 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:13:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:13:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:13:23,531 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:13:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:13:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:13:23,531 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:13:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:13:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:13:23,532 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:13:24,030 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:13:24,030 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-12 19:13:24,032 INFO L202 PluginConnector]: Adding new model poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:13:24 BoogieIcfgContainer [2021-08-12 19:13:24,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:13:24,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:13:24,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:13:24,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:13:24,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:13:23" (1/2) ... [2021-08-12 19:13:24,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@376812f4 and model type poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:13:24, skipping insertion in model container [2021-08-12 19:13:24,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:13:24" (2/2) ... [2021-08-12 19:13:24,040 INFO L111 eAbstractionObserver]: Analyzing ICFG poker-hand-symm.wvr.bpl [2021-08-12 19:13:24,043 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:13:24,044 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:13:24,044 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:13:24,077 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-12 19:13:24,092 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 19:13:24,114 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:13:24,114 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:13:24,114 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:13:24,114 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:13:24,114 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:13:24,114 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:13:24,114 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:13:24,114 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:13:24,120 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 26 transitions, 68 flow [2021-08-12 19:13:24,129 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:24,132 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:24,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 19:13:24,136 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:24,136 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:24,136 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:24,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1990166855, now seen corresponding path program 1 times [2021-08-12 19:13:24,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:24,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010115930] [2021-08-12 19:13:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:24,780 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 121 [2021-08-12 19:13:25,288 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2021-08-12 19:13:25,628 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 48 [2021-08-12 19:13:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:25,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:25,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010115930] [2021-08-12 19:13:25,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010115930] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:13:25,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:13:25,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:13:25,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19649218] [2021-08-12 19:13:25,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:13:25,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:13:25,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:13:25,715 INFO L87 Difference]: Start difference. First operand has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) 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) [2021-08-12 19:13:25,929 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-08-12 19:13:25,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:25,964 INFO L93 Difference]: Finished difference Result 70 states and 164 transitions. [2021-08-12 19:13:25,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:13:25,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) 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 [2021-08-12 19:13:25,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:25,972 INFO L225 Difference]: With dead ends: 70 [2021-08-12 19:13:25,973 INFO L226 Difference]: Without dead ends: 59 [2021-08-12 19:13:25,974 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 654.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:13:25,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-12 19:13:25,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2021-08-12 19:13:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.813953488372093) internal successors, (121), 43 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 121 transitions. [2021-08-12 19:13:26,000 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 121 transitions. Word has length 10 [2021-08-12 19:13:26,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:26,001 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 121 transitions. [2021-08-12 19:13:26,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) 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) [2021-08-12 19:13:26,001 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 121 transitions. [2021-08-12 19:13:26,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 19:13:26,001 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:26,001 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:26,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:13:26,002 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:26,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1977673933, now seen corresponding path program 2 times [2021-08-12 19:13:26,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:26,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025020646] [2021-08-12 19:13:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:26,355 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2021-08-12 19:13:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:26,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:26,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025020646] [2021-08-12 19:13:26,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025020646] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:13:26,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:13:26,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:13:26,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123810744] [2021-08-12 19:13:26,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:13:26,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:26,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:13:26,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:13:26,433 INFO L87 Difference]: Start difference. First operand 44 states and 121 transitions. Second operand has 4 states, 4 states have (on average 2.5) 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) [2021-08-12 19:13:26,607 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-08-12 19:13:26,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:26,631 INFO L93 Difference]: Finished difference Result 68 states and 158 transitions. [2021-08-12 19:13:26,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:13:26,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) 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 [2021-08-12 19:13:26,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:26,632 INFO L225 Difference]: With dead ends: 68 [2021-08-12 19:13:26,632 INFO L226 Difference]: Without dead ends: 59 [2021-08-12 19:13:26,633 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:13:26,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-12 19:13:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-08-12 19:13:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 126 transitions. [2021-08-12 19:13:26,638 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 126 transitions. Word has length 10 [2021-08-12 19:13:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:26,639 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 126 transitions. [2021-08-12 19:13:26,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) 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) [2021-08-12 19:13:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 126 transitions. [2021-08-12 19:13:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 19:13:26,639 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:26,639 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:26,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 19:13:26,640 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:26,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1880928136, now seen corresponding path program 1 times [2021-08-12 19:13:26,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:26,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125647655] [2021-08-12 19:13:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:26,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:26,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125647655] [2021-08-12 19:13:26,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125647655] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:13:26,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:13:26,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:13:26,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018827200] [2021-08-12 19:13:26,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:13:26,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:26,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:13:26,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:26,665 INFO L87 Difference]: Start difference. First operand 46 states and 126 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) 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) [2021-08-12 19:13:26,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:26,680 INFO L93 Difference]: Finished difference Result 72 states and 187 transitions. [2021-08-12 19:13:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:13:26,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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 [2021-08-12 19:13:26,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:26,685 INFO L225 Difference]: With dead ends: 72 [2021-08-12 19:13:26,685 INFO L226 Difference]: Without dead ends: 52 [2021-08-12 19:13:26,686 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-12 19:13:26,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-08-12 19:13:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.764705882352941) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 141 transitions. [2021-08-12 19:13:26,689 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 141 transitions. Word has length 11 [2021-08-12 19:13:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:26,690 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 141 transitions. [2021-08-12 19:13:26,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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) [2021-08-12 19:13:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 141 transitions. [2021-08-12 19:13:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 19:13:26,690 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:26,690 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:26,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 19:13:26,691 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:26,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:26,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1648216420, now seen corresponding path program 1 times [2021-08-12 19:13:26,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:26,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602109345] [2021-08-12 19:13:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:26,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:26,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602109345] [2021-08-12 19:13:26,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602109345] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:13:26,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:13:26,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:13:26,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964349710] [2021-08-12 19:13:26,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:13:26,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:26,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:13:26,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:26,709 INFO L87 Difference]: Start difference. First operand 52 states and 141 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) 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) [2021-08-12 19:13:26,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:26,718 INFO L93 Difference]: Finished difference Result 78 states and 202 transitions. [2021-08-12 19:13:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:13:26,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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 [2021-08-12 19:13:26,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:26,719 INFO L225 Difference]: With dead ends: 78 [2021-08-12 19:13:26,719 INFO L226 Difference]: Without dead ends: 58 [2021-08-12 19:13:26,720 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:26,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-12 19:13:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-08-12 19:13:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.736842105263158) internal successors, (156), 57 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 156 transitions. [2021-08-12 19:13:26,726 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 156 transitions. Word has length 11 [2021-08-12 19:13:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:26,726 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 156 transitions. [2021-08-12 19:13:26,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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) [2021-08-12 19:13:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 156 transitions. [2021-08-12 19:13:26,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 19:13:26,727 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:26,727 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:26,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 19:13:26,727 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:26,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1504532924, now seen corresponding path program 1 times [2021-08-12 19:13:26,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:26,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819758571] [2021-08-12 19:13:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:26,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:26,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819758571] [2021-08-12 19:13:26,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819758571] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:13:26,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:13:26,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:13:26,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674192741] [2021-08-12 19:13:26,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:13:26,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:26,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:13:26,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:26,741 INFO L87 Difference]: Start difference. First operand 58 states and 156 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) 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) [2021-08-12 19:13:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:26,747 INFO L93 Difference]: Finished difference Result 85 states and 216 transitions. [2021-08-12 19:13:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:13:26,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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 [2021-08-12 19:13:26,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:26,748 INFO L225 Difference]: With dead ends: 85 [2021-08-12 19:13:26,748 INFO L226 Difference]: Without dead ends: 66 [2021-08-12 19:13:26,748 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-12 19:13:26,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-08-12 19:13:26,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.6923076923076925) internal successors, (175), 65 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:26,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 175 transitions. [2021-08-12 19:13:26,753 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 175 transitions. Word has length 11 [2021-08-12 19:13:26,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:26,753 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 175 transitions. [2021-08-12 19:13:26,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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) [2021-08-12 19:13:26,753 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 175 transitions. [2021-08-12 19:13:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 19:13:26,753 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:26,754 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:26,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 19:13:26,754 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:26,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1535932638, now seen corresponding path program 1 times [2021-08-12 19:13:26,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:26,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776133171] [2021-08-12 19:13:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:26,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776133171] [2021-08-12 19:13:26,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776133171] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:13:26,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:13:26,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:13:26,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921828992] [2021-08-12 19:13:26,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:13:26,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:26,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:13:26,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:26,766 INFO L87 Difference]: Start difference. First operand 66 states and 175 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) 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) [2021-08-12 19:13:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:26,795 INFO L93 Difference]: Finished difference Result 93 states and 235 transitions. [2021-08-12 19:13:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:13:26,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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 [2021-08-12 19:13:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:26,813 INFO L225 Difference]: With dead ends: 93 [2021-08-12 19:13:26,813 INFO L226 Difference]: Without dead ends: 74 [2021-08-12 19:13:26,814 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:26,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-12 19:13:26,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-08-12 19:13:26,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.6575342465753424) internal successors, (194), 73 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 194 transitions. [2021-08-12 19:13:26,818 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 194 transitions. Word has length 11 [2021-08-12 19:13:26,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:26,818 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 194 transitions. [2021-08-12 19:13:26,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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) [2021-08-12 19:13:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 194 transitions. [2021-08-12 19:13:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 19:13:26,819 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:26,819 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:26,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-12 19:13:26,819 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:26,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:26,820 INFO L82 PathProgramCache]: Analyzing trace with hash -375396698, now seen corresponding path program 1 times [2021-08-12 19:13:26,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:26,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564446037] [2021-08-12 19:13:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:13:26,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:26,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564446037] [2021-08-12 19:13:26,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564446037] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:13:26,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:13:26,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:13:26,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408103322] [2021-08-12 19:13:26,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:13:26,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:26,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:13:26,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:26,836 INFO L87 Difference]: Start difference. First operand 74 states and 194 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:26,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:26,854 INFO L93 Difference]: Finished difference Result 137 states and 322 transitions. [2021-08-12 19:13:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:13:26,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:13:26,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:26,855 INFO L225 Difference]: With dead ends: 137 [2021-08-12 19:13:26,855 INFO L226 Difference]: Without dead ends: 100 [2021-08-12 19:13:26,856 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:26,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-12 19:13:26,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-08-12 19:13:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.4625) internal successors, (197), 80 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) [2021-08-12 19:13:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2021-08-12 19:13:26,860 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 12 [2021-08-12 19:13:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:26,860 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2021-08-12 19:13:26,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:26,861 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2021-08-12 19:13:26,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 19:13:26,861 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:26,861 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:26,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-12 19:13:26,861 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:26,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:26,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1248628485, now seen corresponding path program 1 times [2021-08-12 19:13:26,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:26,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929421279] [2021-08-12 19:13:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:13:26,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:26,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929421279] [2021-08-12 19:13:26,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929421279] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:13:26,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:13:26,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:13:26,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820417103] [2021-08-12 19:13:26,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:13:26,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:26,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:13:26,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:26,910 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:26,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:26,940 INFO L93 Difference]: Finished difference Result 119 states and 259 transitions. [2021-08-12 19:13:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:13:26,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:13:26,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:26,941 INFO L225 Difference]: With dead ends: 119 [2021-08-12 19:13:26,941 INFO L226 Difference]: Without dead ends: 82 [2021-08-12 19:13:26,941 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-12 19:13:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2021-08-12 19:13:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 72 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 155 transitions. [2021-08-12 19:13:26,947 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 155 transitions. Word has length 12 [2021-08-12 19:13:26,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:26,947 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 155 transitions. [2021-08-12 19:13:26,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:26,947 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 155 transitions. [2021-08-12 19:13:26,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 19:13:26,950 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:26,950 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:26,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-12 19:13:26,951 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:26,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:26,951 INFO L82 PathProgramCache]: Analyzing trace with hash -579329596, now seen corresponding path program 1 times [2021-08-12 19:13:26,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:26,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891790632] [2021-08-12 19:13:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:13:26,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:26,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891790632] [2021-08-12 19:13:26,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891790632] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:13:26,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:13:26,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:13:26,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372221937] [2021-08-12 19:13:26,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:13:26,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:26,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:13:26,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:26,995 INFO L87 Difference]: Start difference. First operand 73 states and 155 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:27,010 INFO L93 Difference]: Finished difference Result 101 states and 196 transitions. [2021-08-12 19:13:27,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:13:27,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:13:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:27,011 INFO L225 Difference]: With dead ends: 101 [2021-08-12 19:13:27,011 INFO L226 Difference]: Without dead ends: 82 [2021-08-12 19:13:27,011 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:27,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-12 19:13:27,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-08-12 19:13:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 65 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 139 transitions. [2021-08-12 19:13:27,015 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 139 transitions. Word has length 12 [2021-08-12 19:13:27,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:27,015 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 139 transitions. [2021-08-12 19:13:27,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:27,016 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 139 transitions. [2021-08-12 19:13:27,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 19:13:27,016 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:27,016 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:27,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-12 19:13:27,016 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:27,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:27,017 INFO L82 PathProgramCache]: Analyzing trace with hash 339573799, now seen corresponding path program 1 times [2021-08-12 19:13:27,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:27,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295819201] [2021-08-12 19:13:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:13:27,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:27,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295819201] [2021-08-12 19:13:27,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295819201] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:13:27,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:13:27,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:13:27,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052754224] [2021-08-12 19:13:27,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:13:27,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:27,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:13:27,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:27,044 INFO L87 Difference]: Start difference. First operand 66 states and 139 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:27,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:27,078 INFO L93 Difference]: Finished difference Result 101 states and 191 transitions. [2021-08-12 19:13:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:13:27,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:13:27,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:27,079 INFO L225 Difference]: With dead ends: 101 [2021-08-12 19:13:27,079 INFO L226 Difference]: Without dead ends: 75 [2021-08-12 19:13:27,080 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:13:27,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-12 19:13:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-08-12 19:13:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 136 transitions. [2021-08-12 19:13:27,087 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 136 transitions. Word has length 12 [2021-08-12 19:13:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:27,087 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 136 transitions. [2021-08-12 19:13:27,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 136 transitions. [2021-08-12 19:13:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:13:27,089 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:27,089 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:27,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-12 19:13:27,089 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:27,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1848204445, now seen corresponding path program 1 times [2021-08-12 19:13:27,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:27,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688840418] [2021-08-12 19:13:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:27,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:27,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688840418] [2021-08-12 19:13:27,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688840418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:27,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701498726] [2021-08-12 19:13:27,305 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 [2021-08-12 19:13:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:27,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:13:27,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:13:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:27,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701498726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:27,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:13:27,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:13:27,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721276348] [2021-08-12 19:13:27,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:13:27,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:27,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:13:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:13:27,765 INFO L87 Difference]: Start difference. First operand 66 states and 136 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-08-12 19:13:28,236 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-08-12 19:13:28,416 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-08-12 19:13:28,595 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-08-12 19:13:28,805 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-08-12 19:13:28,927 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-08-12 19:13:29,088 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-08-12 19:13:29,240 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-08-12 19:13:29,543 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-08-12 19:13:29,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:29,583 INFO L93 Difference]: Finished difference Result 135 states and 275 transitions. [2021-08-12 19:13:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:13:29,584 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 14 [2021-08-12 19:13:29,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:29,585 INFO L225 Difference]: With dead ends: 135 [2021-08-12 19:13:29,585 INFO L226 Difference]: Without dead ends: 119 [2021-08-12 19:13:29,585 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1909.9ms TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:13:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-12 19:13:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2021-08-12 19:13:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:29,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-08-12 19:13:29,590 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 14 [2021-08-12 19:13:29,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:29,590 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-08-12 19:13:29,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-08-12 19:13:29,590 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-08-12 19:13:29,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:13:29,590 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:29,591 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:29,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-12 19:13:29,809 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:29,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1124293829, now seen corresponding path program 2 times [2021-08-12 19:13:29,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:29,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186401270] [2021-08-12 19:13:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:30,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:30,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186401270] [2021-08-12 19:13:30,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186401270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:30,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038733828] [2021-08-12 19:13:30,063 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 [2021-08-12 19:13:30,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:13:30,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:13:30,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:13:30,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:13:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:30,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038733828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:30,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:13:30,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:13:30,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14921144] [2021-08-12 19:13:30,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:13:30,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:30,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:13:30,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:13:30,379 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-08-12 19:13:30,588 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-08-12 19:13:30,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:30,797 INFO L93 Difference]: Finished difference Result 107 states and 215 transitions. [2021-08-12 19:13:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:13:30,797 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 14 [2021-08-12 19:13:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:30,798 INFO L225 Difference]: With dead ends: 107 [2021-08-12 19:13:30,798 INFO L226 Difference]: Without dead ends: 98 [2021-08-12 19:13:30,798 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 580.8ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:13:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-12 19:13:30,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-08-12 19:13:30,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 79 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:30,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2021-08-12 19:13:30,803 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 14 [2021-08-12 19:13:30,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:30,803 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2021-08-12 19:13:30,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-08-12 19:13:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2021-08-12 19:13:30,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:13:30,804 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:30,804 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:31,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 19:13:31,013 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:31,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:31,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1311401613, now seen corresponding path program 3 times [2021-08-12 19:13:31,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:31,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910407192] [2021-08-12 19:13:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:31,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:31,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910407192] [2021-08-12 19:13:31,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910407192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:31,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45047308] [2021-08-12 19:13:31,187 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 [2021-08-12 19:13:31,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:13:31,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:13:31,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:13:31,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:13:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:31,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45047308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:31,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:13:31,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:13:31,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467098279] [2021-08-12 19:13:31,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:13:31,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:13:31,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:13:31,433 INFO L87 Difference]: Start difference. First operand 80 states and 167 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-08-12 19:13:31,625 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-08-12 19:13:31,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:31,780 INFO L93 Difference]: Finished difference Result 110 states and 220 transitions. [2021-08-12 19:13:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:13:31,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 14 [2021-08-12 19:13:31,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:31,782 INFO L225 Difference]: With dead ends: 110 [2021-08-12 19:13:31,782 INFO L226 Difference]: Without dead ends: 101 [2021-08-12 19:13:31,782 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 474.9ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:13:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-12 19:13:31,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-08-12 19:13:31,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-08-12 19:13:31,786 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 14 [2021-08-12 19:13:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:31,787 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-08-12 19:13:31,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-08-12 19:13:31,787 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-08-12 19:13:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:13:31,787 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:31,787 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:31,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-12 19:13:31,993 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:31,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:31,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1308775837, now seen corresponding path program 4 times [2021-08-12 19:13:31,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:31,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353394500] [2021-08-12 19:13:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:32,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:32,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353394500] [2021-08-12 19:13:32,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353394500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:32,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770811276] [2021-08-12 19:13:32,217 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 [2021-08-12 19:13:32,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:13:32,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:13:32,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:13:32,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:13:32,421 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-08-12 19:13:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:32,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770811276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:32,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:13:32,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:13:32,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911334161] [2021-08-12 19:13:32,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:13:32,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:32,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:13:32,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:13:32,541 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-08-12 19:13:32,934 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-08-12 19:13:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:33,079 INFO L93 Difference]: Finished difference Result 122 states and 239 transitions. [2021-08-12 19:13:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:13:33,079 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 14 [2021-08-12 19:13:33,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:33,080 INFO L225 Difference]: With dead ends: 122 [2021-08-12 19:13:33,080 INFO L226 Difference]: Without dead ends: 113 [2021-08-12 19:13:33,080 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 764.5ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:13:33,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-12 19:13:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2021-08-12 19:13:33,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 79 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2021-08-12 19:13:33,085 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 14 [2021-08-12 19:13:33,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:33,085 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2021-08-12 19:13:33,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-08-12 19:13:33,085 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2021-08-12 19:13:33,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:13:33,086 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:33,086 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:33,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:13:33,297 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:33,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:33,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1047840443, now seen corresponding path program 5 times [2021-08-12 19:13:33,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:33,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523237631] [2021-08-12 19:13:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:33,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:33,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523237631] [2021-08-12 19:13:33,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523237631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:33,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742014754] [2021-08-12 19:13:33,432 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 [2021-08-12 19:13:33,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:13:33,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:13:33,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:13:33,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:13:36,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-08-12 19:13:36,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,423 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,423 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,429 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-08-12 19:13:36,437 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,443 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,449 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,450 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,456 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,463 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,468 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-08-12 19:13:36,476 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-08-12 19:13:36,484 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,490 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,496 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-08-12 19:13:36,503 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-08-12 19:13:36,510 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,515 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,521 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,527 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,532 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,533 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,538 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,544 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,550 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,556 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,561 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,566 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,571 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,576 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,582 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,582 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,587 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,593 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-08-12 19:13:36,599 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,606 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,610 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,610 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-08-12 19:13:36,617 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,622 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,629 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,634 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,639 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-08-12 19:13:36,646 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-08-12 19:13:36,652 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,657 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,663 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-08-12 19:13:36,669 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,674 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,678 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,683 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,688 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,692 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-08-12 19:13:36,699 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,703 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-08-12 19:13:36,710 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,714 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,719 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,724 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,728 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,729 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,733 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,737 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,741 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,745 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,749 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,751 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,755 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,760 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:13:36,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-08-12 19:13:36,765 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,769 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,773 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,777 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,780 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,780 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,784 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,785 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,788 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,792 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,806 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,809 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,813 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,817 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,820 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,823 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,824 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,827 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,830 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,927 INFO L628 ElimStorePlain]: treesize reduction 34, result has 77.5 percent of original size [2021-08-12 19:13:36,930 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 5 treesize of output 3 [2021-08-12 19:13:36,931 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-12 19:13:36,934 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,936 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 13 treesize of output 9 [2021-08-12 19:13:36,937 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:36,940 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 13 treesize of output 9 [2021-08-12 19:13:36,941 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-08-12 19:13:37,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:13:37,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 19:13:37,025 INFO L247 ElimStorePlain]: Needed 85 recursive calls to eliminate 3 variables, input treesize:4202, output treesize:38 [2021-08-12 19:13:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:37,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742014754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:37,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:13:37,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:13:37,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385383531] [2021-08-12 19:13:37,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:13:37,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:13:37,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:13:37,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:13:37,091 INFO L87 Difference]: Start difference. First operand 80 states and 167 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:13:37,275 INFO L93 Difference]: Finished difference Result 104 states and 202 transitions. [2021-08-12 19:13:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:13:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 19:13:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:13:37,275 INFO L225 Difference]: With dead ends: 104 [2021-08-12 19:13:37,275 INFO L226 Difference]: Without dead ends: 82 [2021-08-12 19:13:37,276 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:13:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-12 19:13:37,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-08-12 19:13:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 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) [2021-08-12 19:13:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-08-12 19:13:37,280 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 14 [2021-08-12 19:13:37,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:13:37,280 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-08-12 19:13:37,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:13:37,280 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-08-12 19:13:37,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:13:37,281 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:13:37,281 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:13:37,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-12 19:13:37,492 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:13:37,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:13:37,493 INFO L82 PathProgramCache]: Analyzing trace with hash 685771365, now seen corresponding path program 1 times [2021-08-12 19:13:37,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:13:37,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280476347] [2021-08-12 19:13:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:13:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:13:37,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:13:37,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280476347] [2021-08-12 19:13:37,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280476347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:13:37,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158505458] [2021-08-12 19:13:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-08-12 19:13:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:13:37,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:13:37,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:13:37,942 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown