/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-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:40:33,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:40:33,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:40:33,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:40:33,989 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:40:34,022 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:40:34,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:40:34,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:40:34,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:40:34,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:40:34,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:40:34,026 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:40:34,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:40:34,026 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:40:34,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:40:34,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:40:34,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:40:34,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:40:34,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:40:34,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:40:34,028 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:40:34,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:40:34,028 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:40:34,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:40:34,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:40:34,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:40:34,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:40:34,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:40:34,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:40:34,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:40:34,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:40:34,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:40:34,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:40:34,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:40:34,030 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:40:34,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:40:34,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:40:34,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:40:34,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:40:34,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:40:34,386 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:40:34,388 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:40:34,388 INFO L432 ainManager$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 [2021-07-13 19:40:34,389 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl' [2021-07-13 19:40:34,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:40:34,442 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:40:34,443 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:40:34,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:40:34,443 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:40:34,454 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 13.07 07:40:34" (1/1) ... [2021-07-13 19:40:34,475 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 13.07 07:40:34" (1/1) ... [2021-07-13 19:40:34,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:40:34,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:40:34,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:40:34,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:40:34,494 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 13.07 07:40:34" (1/1) ... [2021-07-13 19:40:34,494 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 13.07 07:40:34" (1/1) ... [2021-07-13 19:40:34,508 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 13.07 07:40:34" (1/1) ... [2021-07-13 19:40:34,509 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 13.07 07:40:34" (1/1) ... [2021-07-13 19:40:34,526 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 13.07 07:40:34" (1/1) ... [2021-07-13 19:40:34,529 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 13.07 07:40:34" (1/1) ... [2021-07-13 19:40:34,530 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 13.07 07:40:34" (1/1) ... [2021-07-13 19:40:34,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:40:34,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:40:34,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:40:34,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:40:34,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:40:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:40:34,619 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:40:34,620 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:40:34,620 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:40:34,620 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:40:34,620 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:40:34,620 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:40:34,620 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:40:34,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:40:34,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:40:34,621 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:40:35,362 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:40:35,363 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-07-13 19:40:35,365 INFO L202 PluginConnector]: Adding new model poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:40:35 BoogieIcfgContainer [2021-07-13 19:40:35,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:40:35,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:40:35,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:40:35,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:40:35,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:40:34" (1/2) ... [2021-07-13 19:40:35,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fd103c and model type poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:40:35, skipping insertion in model container [2021-07-13 19:40:35,371 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 13.07 07:40:35" (2/2) ... [2021-07-13 19:40:35,374 INFO L111 eAbstractionObserver]: Analyzing ICFG poker-hand-symm.wvr.bpl [2021-07-13 19:40:35,379 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:40:35,380 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:40:35,381 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:40:35,381 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:40:35,424 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:40:35,449 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:40:35,465 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:40:35,465 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:40:35,465 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:40:35,465 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:40:35,466 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:40:35,466 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:40:35,466 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:40:35,466 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:40:35,473 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 26 transitions, 68 flow [2021-07-13 19:40:35,488 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 39 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 38 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 38 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:40:35,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:35,497 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:35,497 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:35,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:35,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1990166855, now seen corresponding path program 1 times [2021-07-13 19:40:35,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:35,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375453867] [2021-07-13 19:40:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:36,311 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 121 [2021-07-13 19:40:36,920 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2021-07-13 19:40:37,447 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 48 [2021-07-13 19:40:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:37,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:37,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375453867] [2021-07-13 19:40:37,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375453867] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:40:37,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:40:37,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:40:37,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854786329] [2021-07-13 19:40:37,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:40:37,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:37,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:40:37,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:40:37,562 INFO L87 Difference]: Start difference. First operand has 39 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 38 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-07-13 19:40:37,827 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 19:40:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:37,861 INFO L93 Difference]: Finished difference Result 66 states and 158 transitions. [2021-07-13 19:40:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:40:37,862 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 [2021-07-13 19:40:37,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:37,870 INFO L225 Difference]: With dead ends: 66 [2021-07-13 19:40:37,870 INFO L226 Difference]: Without dead ends: 59 [2021-07-13 19:40:37,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 810.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:40:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-13 19:40:37,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2021-07-13 19:40:37,903 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) [2021-07-13 19:40:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 121 transitions. [2021-07-13 19:40:37,905 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 121 transitions. Word has length 10 [2021-07-13 19:40:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:37,905 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 121 transitions. [2021-07-13 19:40:37,905 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) [2021-07-13 19:40:37,906 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 121 transitions. [2021-07-13 19:40:37,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:40:37,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:37,907 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:37,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:40:37,907 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:37,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:37,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1977673933, now seen corresponding path program 2 times [2021-07-13 19:40:37,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:37,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499464529] [2021-07-13 19:40:37,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:38,343 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2021-07-13 19:40:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:38,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:38,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499464529] [2021-07-13 19:40:38,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499464529] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:40:38,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:40:38,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:40:38,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905117591] [2021-07-13 19:40:38,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:40:38,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:38,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:40:38,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:40:38,418 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) [2021-07-13 19:40:38,603 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 19:40:38,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:38,624 INFO L93 Difference]: Finished difference Result 66 states and 156 transitions. [2021-07-13 19:40:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:40:38,625 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 [2021-07-13 19:40:38,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:38,626 INFO L225 Difference]: With dead ends: 66 [2021-07-13 19:40:38,626 INFO L226 Difference]: Without dead ends: 59 [2021-07-13 19:40:38,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 490.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:40:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-13 19:40:38,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-07-13 19:40:38,631 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) [2021-07-13 19:40:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 126 transitions. [2021-07-13 19:40:38,632 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 126 transitions. Word has length 10 [2021-07-13 19:40:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:38,633 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 126 transitions. [2021-07-13 19:40:38,633 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) [2021-07-13 19:40:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 126 transitions. [2021-07-13 19:40:38,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:40:38,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:38,634 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:38,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:40:38,634 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:38,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:38,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1880928136, now seen corresponding path program 1 times [2021-07-13 19:40:38,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:38,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143049962] [2021-07-13 19:40:38,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:38,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:38,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143049962] [2021-07-13 19:40:38,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143049962] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:40:38,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:40:38,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:40:38,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908079911] [2021-07-13 19:40:38,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:40:38,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:38,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:40:38,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:38,650 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) [2021-07-13 19:40:38,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:38,656 INFO L93 Difference]: Finished difference Result 52 states and 141 transitions. [2021-07-13 19:40:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:40:38,657 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 [2021-07-13 19:40:38,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:38,658 INFO L225 Difference]: With dead ends: 52 [2021-07-13 19:40:38,658 INFO L226 Difference]: Without dead ends: 52 [2021-07-13 19:40:38,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:38,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-07-13 19:40:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-07-13 19:40:38,663 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) [2021-07-13 19:40:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 141 transitions. [2021-07-13 19:40:38,664 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 141 transitions. Word has length 11 [2021-07-13 19:40:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:38,665 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 141 transitions. [2021-07-13 19:40:38,665 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) [2021-07-13 19:40:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 141 transitions. [2021-07-13 19:40:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:40:38,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:38,666 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:38,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:40:38,666 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:38,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1648216420, now seen corresponding path program 1 times [2021-07-13 19:40:38,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:38,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270394193] [2021-07-13 19:40:38,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:38,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:38,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270394193] [2021-07-13 19:40:38,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270394193] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:40:38,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:40:38,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:40:38,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758483221] [2021-07-13 19:40:38,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:40:38,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:38,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:40:38,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:38,682 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) [2021-07-13 19:40:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:38,688 INFO L93 Difference]: Finished difference Result 58 states and 156 transitions. [2021-07-13 19:40:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:40:38,688 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 [2021-07-13 19:40:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:38,689 INFO L225 Difference]: With dead ends: 58 [2021-07-13 19:40:38,689 INFO L226 Difference]: Without dead ends: 58 [2021-07-13 19:40:38,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:38,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-07-13 19:40:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-07-13 19:40:38,694 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) [2021-07-13 19:40:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 156 transitions. [2021-07-13 19:40:38,695 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 156 transitions. Word has length 11 [2021-07-13 19:40:38,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:38,695 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 156 transitions. [2021-07-13 19:40:38,695 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) [2021-07-13 19:40:38,695 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 156 transitions. [2021-07-13 19:40:38,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:40:38,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:38,696 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:38,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:40:38,696 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:38,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:38,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1504532924, now seen corresponding path program 1 times [2021-07-13 19:40:38,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:38,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863125515] [2021-07-13 19:40:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:38,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:38,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863125515] [2021-07-13 19:40:38,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863125515] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:40:38,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:40:38,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:40:38,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543376983] [2021-07-13 19:40:38,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:40:38,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:38,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:40:38,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:38,712 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) [2021-07-13 19:40:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:38,717 INFO L93 Difference]: Finished difference Result 66 states and 175 transitions. [2021-07-13 19:40:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:40:38,718 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 [2021-07-13 19:40:38,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:38,719 INFO L225 Difference]: With dead ends: 66 [2021-07-13 19:40:38,719 INFO L226 Difference]: Without dead ends: 66 [2021-07-13 19:40:38,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:38,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-13 19:40:38,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-07-13 19:40:38,724 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) [2021-07-13 19:40:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 175 transitions. [2021-07-13 19:40:38,724 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 175 transitions. Word has length 11 [2021-07-13 19:40:38,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:38,725 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 175 transitions. [2021-07-13 19:40:38,725 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) [2021-07-13 19:40:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 175 transitions. [2021-07-13 19:40:38,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:40:38,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:38,726 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:38,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:40:38,726 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:38,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:38,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1535932638, now seen corresponding path program 1 times [2021-07-13 19:40:38,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:38,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561479338] [2021-07-13 19:40:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:38,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:38,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561479338] [2021-07-13 19:40:38,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561479338] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:40:38,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:40:38,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:40:38,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425118101] [2021-07-13 19:40:38,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:40:38,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:38,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:40:38,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:38,750 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) [2021-07-13 19:40:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:38,754 INFO L93 Difference]: Finished difference Result 74 states and 194 transitions. [2021-07-13 19:40:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:40:38,755 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 [2021-07-13 19:40:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:38,756 INFO L225 Difference]: With dead ends: 74 [2021-07-13 19:40:38,756 INFO L226 Difference]: Without dead ends: 74 [2021-07-13 19:40:38,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-07-13 19:40:38,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-07-13 19:40:38,760 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) [2021-07-13 19:40:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 194 transitions. [2021-07-13 19:40:38,760 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 194 transitions. Word has length 11 [2021-07-13 19:40:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:38,761 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 194 transitions. [2021-07-13 19:40:38,761 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) [2021-07-13 19:40:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 194 transitions. [2021-07-13 19:40:38,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:40:38,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:38,762 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:38,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 19:40:38,762 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:38,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:38,762 INFO L82 PathProgramCache]: Analyzing trace with hash -375396698, now seen corresponding path program 1 times [2021-07-13 19:40:38,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:38,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33476264] [2021-07-13 19:40:38,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:40:38,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:38,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33476264] [2021-07-13 19:40:38,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33476264] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:40:38,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:40:38,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:40:38,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886184216] [2021-07-13 19:40:38,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:40:38,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:38,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:40:38,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:38,783 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) [2021-07-13 19:40:38,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:38,806 INFO L93 Difference]: Finished difference Result 100 states and 228 transitions. [2021-07-13 19:40:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:40:38,806 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 [2021-07-13 19:40:38,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:38,809 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:40:38,809 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 19:40:38,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:38,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 19:40:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-07-13 19:40:38,826 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) [2021-07-13 19:40:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2021-07-13 19:40:38,826 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 12 [2021-07-13 19:40:38,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:38,827 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2021-07-13 19:40:38,827 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) [2021-07-13 19:40:38,827 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2021-07-13 19:40:38,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:40:38,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:38,828 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:38,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:40:38,828 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:38,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1248628485, now seen corresponding path program 1 times [2021-07-13 19:40:38,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:38,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725438621] [2021-07-13 19:40:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:40:38,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:38,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725438621] [2021-07-13 19:40:38,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725438621] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:40:38,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:40:38,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:40:38,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138639161] [2021-07-13 19:40:38,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:40:38,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:38,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:40:38,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:38,902 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) [2021-07-13 19:40:38,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:38,937 INFO L93 Difference]: Finished difference Result 82 states and 165 transitions. [2021-07-13 19:40:38,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:40:38,938 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 [2021-07-13 19:40:38,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:38,939 INFO L225 Difference]: With dead ends: 82 [2021-07-13 19:40:38,939 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:40:38,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:38,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:40:38,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2021-07-13 19:40:38,947 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) [2021-07-13 19:40:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 155 transitions. [2021-07-13 19:40:38,948 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 155 transitions. Word has length 12 [2021-07-13 19:40:38,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:38,948 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 155 transitions. [2021-07-13 19:40:38,948 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) [2021-07-13 19:40:38,948 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 155 transitions. [2021-07-13 19:40:38,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:40:38,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:38,956 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:38,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:40:38,957 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:38,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:38,957 INFO L82 PathProgramCache]: Analyzing trace with hash -579329596, now seen corresponding path program 1 times [2021-07-13 19:40:38,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:38,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797407820] [2021-07-13 19:40:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:40:38,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:38,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797407820] [2021-07-13 19:40:38,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797407820] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:40:38,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:40:38,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:40:38,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77092943] [2021-07-13 19:40:38,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:40:38,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:38,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:40:38,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:38,992 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) [2021-07-13 19:40:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:39,006 INFO L93 Difference]: Finished difference Result 82 states and 160 transitions. [2021-07-13 19:40:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:40:39,006 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 [2021-07-13 19:40:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:39,008 INFO L225 Difference]: With dead ends: 82 [2021-07-13 19:40:39,008 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:40:39,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:39,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:40:39,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-07-13 19:40:39,011 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) [2021-07-13 19:40:39,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 139 transitions. [2021-07-13 19:40:39,014 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 139 transitions. Word has length 12 [2021-07-13 19:40:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:39,014 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 139 transitions. [2021-07-13 19:40:39,014 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) [2021-07-13 19:40:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 139 transitions. [2021-07-13 19:40:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:40:39,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:39,019 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:39,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-13 19:40:39,020 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:39,026 INFO L82 PathProgramCache]: Analyzing trace with hash 339573799, now seen corresponding path program 1 times [2021-07-13 19:40:39,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:39,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781279749] [2021-07-13 19:40:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:40:39,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:39,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781279749] [2021-07-13 19:40:39,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781279749] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:40:39,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:40:39,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:40:39,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747540903] [2021-07-13 19:40:39,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:40:39,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:39,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:40:39,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:39,080 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) [2021-07-13 19:40:39,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:39,102 INFO L93 Difference]: Finished difference Result 82 states and 155 transitions. [2021-07-13 19:40:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:40:39,103 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 [2021-07-13 19:40:39,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:39,103 INFO L225 Difference]: With dead ends: 82 [2021-07-13 19:40:39,103 INFO L226 Difference]: Without dead ends: 75 [2021-07-13 19:40:39,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:40:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-13 19:40:39,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-07-13 19:40:39,108 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) [2021-07-13 19:40:39,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 136 transitions. [2021-07-13 19:40:39,108 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 136 transitions. Word has length 12 [2021-07-13 19:40:39,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:39,109 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 136 transitions. [2021-07-13 19:40:39,109 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) [2021-07-13 19:40:39,109 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 136 transitions. [2021-07-13 19:40:39,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:40:39,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:39,110 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:39,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-13 19:40:39,110 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:39,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:39,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1848204445, now seen corresponding path program 1 times [2021-07-13 19:40:39,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:39,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512329315] [2021-07-13 19:40:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:39,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:39,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512329315] [2021-07-13 19:40:39,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512329315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:39,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741606116] [2021-07-13 19:40:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:39,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:40:39,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:39,760 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-07-13 19:40:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:40,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741606116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:40,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:40,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:40:40,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506492189] [2021-07-13 19:40:40,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:40,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:40,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:40,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:40,117 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) [2021-07-13 19:40:40,297 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-07-13 19:40:40,512 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-07-13 19:40:40,699 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-07-13 19:40:40,903 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-07-13 19:40:41,106 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-07-13 19:40:41,331 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-07-13 19:40:41,490 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-07-13 19:40:41,704 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-13 19:40:41,899 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-07-13 19:40:42,064 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-07-13 19:40:42,256 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-07-13 19:40:42,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:42,304 INFO L93 Difference]: Finished difference Result 133 states and 272 transitions. [2021-07-13 19:40:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:40:42,305 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 [2021-07-13 19:40:42,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:42,306 INFO L225 Difference]: With dead ends: 133 [2021-07-13 19:40:42,306 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:40:42,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2444.3ms TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:40:42,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:40:42,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2021-07-13 19:40:42,308 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) [2021-07-13 19:40:42,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-07-13 19:40:42,309 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 14 [2021-07-13 19:40:42,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:42,309 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-07-13 19:40:42,309 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) [2021-07-13 19:40:42,309 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-07-13 19:40:42,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:40:42,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:42,310 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:42,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 19:40:42,517 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:42,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:42,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1124293829, now seen corresponding path program 2 times [2021-07-13 19:40:42,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:42,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503143985] [2021-07-13 19:40:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:42,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:42,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503143985] [2021-07-13 19:40:42,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503143985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:42,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803567074] [2021-07-13 19:40:42,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:42,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:42,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:42,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:40:42,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:43,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803567074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:43,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:43,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:40:43,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691170944] [2021-07-13 19:40:43,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:43,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:43,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:43,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:43,170 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) [2021-07-13 19:40:43,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:43,577 INFO L93 Difference]: Finished difference Result 105 states and 213 transitions. [2021-07-13 19:40:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:43,577 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 [2021-07-13 19:40:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:43,579 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:40:43,579 INFO L226 Difference]: Without dead ends: 98 [2021-07-13 19:40:43,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 677.6ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:43,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-13 19:40:43,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-07-13 19:40:43,582 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) [2021-07-13 19:40:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2021-07-13 19:40:43,583 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 14 [2021-07-13 19:40:43,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:43,583 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2021-07-13 19:40:43,583 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) [2021-07-13 19:40:43,583 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2021-07-13 19:40:43,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:40:43,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:43,584 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:43,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:40:43,793 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:43,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:43,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1311401613, now seen corresponding path program 3 times [2021-07-13 19:40:43,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:43,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589087815] [2021-07-13 19:40:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:44,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:44,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589087815] [2021-07-13 19:40:44,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589087815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:44,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648391855] [2021-07-13 19:40:44,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:44,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:40:44,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:44,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:40:44,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:44,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648391855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:44,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:44,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:40:44,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969497970] [2021-07-13 19:40:44,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:44,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:44,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:44,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:44,397 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) [2021-07-13 19:40:44,609 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-07-13 19:40:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:44,801 INFO L93 Difference]: Finished difference Result 108 states and 218 transitions. [2021-07-13 19:40:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:44,801 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 [2021-07-13 19:40:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:44,804 INFO L225 Difference]: With dead ends: 108 [2021-07-13 19:40:44,804 INFO L226 Difference]: Without dead ends: 101 [2021-07-13 19:40:44,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 603.0ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:44,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-13 19:40:44,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-07-13 19:40:44,809 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) [2021-07-13 19:40:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-07-13 19:40:44,809 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 14 [2021-07-13 19:40:44,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:44,810 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-07-13 19:40:44,810 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) [2021-07-13 19:40:44,810 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-07-13 19:40:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:40:44,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:44,810 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:45,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:40:45,033 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:45,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1308775837, now seen corresponding path program 4 times [2021-07-13 19:40:45,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:45,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261965587] [2021-07-13 19:40:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:45,240 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-13 19:40:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:45,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:45,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261965587] [2021-07-13 19:40:45,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261965587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:45,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797702321] [2021-07-13 19:40:45,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:45,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:45,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:45,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:40:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:45,577 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-07-13 19:40:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:45,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797702321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:45,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:45,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:40:45,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566186189] [2021-07-13 19:40:45,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:40:45,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:45,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:40:45,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:40:45,716 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) [2021-07-13 19:40:45,837 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-13 19:40:46,041 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-07-13 19:40:46,181 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-13 19:40:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:46,353 INFO L93 Difference]: Finished difference Result 120 states and 237 transitions. [2021-07-13 19:40:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:46,354 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 [2021-07-13 19:40:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:46,355 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:40:46,355 INFO L226 Difference]: Without dead ends: 113 [2021-07-13 19:40:46,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 944.6ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:40:46,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-13 19:40:46,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2021-07-13 19:40:46,357 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) [2021-07-13 19:40:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2021-07-13 19:40:46,358 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 14 [2021-07-13 19:40:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:46,358 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2021-07-13 19:40:46,358 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) [2021-07-13 19:40:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2021-07-13 19:40:46,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:40:46,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:46,358 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:46,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:46,581 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:46,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:46,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1047840443, now seen corresponding path program 5 times [2021-07-13 19:40:46,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:46,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068561249] [2021-07-13 19:40:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:46,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:46,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068561249] [2021-07-13 19:40:46,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068561249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:46,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725589695] [2021-07-13 19:40:46,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:46,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:46,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:46,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:40:46,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:46,973 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-13 19:40:50,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:50,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:50,768 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 [2021-07-13 19:40:50,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,782 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,782 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:50,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:50,791 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 [2021-07-13 19:40:50,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,800 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,808 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,816 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,825 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,835 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,843 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,854 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,862 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,870 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,871 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,879 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:50,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:50,891 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 [2021-07-13 19:40:50,892 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,902 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:50,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:50,912 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 [2021-07-13 19:40:50,913 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,923 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:50,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:50,933 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 [2021-07-13 19:40:50,934 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,943 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,952 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:50,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:50,960 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 [2021-07-13 19:40:50,961 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,968 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,969 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,978 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:50,987 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:50,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:50,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:50,998 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 [2021-07-13 19:40:50,999 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,007 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,017 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,025 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,032 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 [2021-07-13 19:40:51,033 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,039 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,045 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,052 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,053 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,059 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,065 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,073 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,080 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,102 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,111 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,116 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,127 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 [2021-07-13 19:40:51,129 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,137 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,138 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,147 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,157 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,167 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,176 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 [2021-07-13 19:40:51,177 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,186 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,194 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,202 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,212 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 [2021-07-13 19:40:51,212 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,221 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,238 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,244 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,250 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,257 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 [2021-07-13 19:40:51,258 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,263 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,275 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 [2021-07-13 19:40:51,276 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,280 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,281 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,288 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,293 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,298 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,303 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,303 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,310 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,316 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,322 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,326 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,331 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,338 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,342 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:40:51,348 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 [2021-07-13 19:40:51,349 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,354 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,359 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,360 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,365 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,369 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,374 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,378 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,383 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,387 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,393 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,398 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,403 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,408 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,413 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,416 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,417 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,423 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,427 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,430 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,434 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,438 INFO L550 ElimStorePlain]: Start of recursive call 90: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,532 INFO L628 ElimStorePlain]: treesize reduction 34, result has 77.5 percent of original size [2021-07-13 19:40:51,535 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 [2021-07-13 19:40:51,536 INFO L550 ElimStorePlain]: Start of recursive call 91: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,539 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:51,539 INFO L550 ElimStorePlain]: Start of recursive call 92: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,542 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 [2021-07-13 19:40:51,543 INFO L550 ElimStorePlain]: Start of recursive call 93: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,545 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 [2021-07-13 19:40:51,546 INFO L550 ElimStorePlain]: Start of recursive call 94: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:51,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:51,572 INFO L247 ElimStorePlain]: Needed 94 recursive calls to eliminate 3 variables, input treesize:4678, output treesize:38 [2021-07-13 19:40:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:51,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725589695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:51,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:51,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:40:51,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304527870] [2021-07-13 19:40:51,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:40:51,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:51,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:40:51,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:40:51,657 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) [2021-07-13 19:40:51,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:51,859 INFO L93 Difference]: Finished difference Result 93 states and 184 transitions. [2021-07-13 19:40:51,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:40:51,860 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 [2021-07-13 19:40:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:51,860 INFO L225 Difference]: With dead ends: 93 [2021-07-13 19:40:51,860 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:40:51,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 491.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:40:51,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:40:51,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-07-13 19:40:51,863 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) [2021-07-13 19:40:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-07-13 19:40:51,863 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 14 [2021-07-13 19:40:51,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:51,863 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-07-13 19:40:51,863 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) [2021-07-13 19:40:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-07-13 19:40:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:40:51,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:51,864 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:52,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 19:40:52,073 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash 685771365, now seen corresponding path program 1 times [2021-07-13 19:40:52,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:52,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990377328] [2021-07-13 19:40:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:52,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:52,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990377328] [2021-07-13 19:40:52,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990377328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:52,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148294457] [2021-07-13 19:40:52,333 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 [2021-07-13 19:40:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:52,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:40:52,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:52,611 WARN L205 SmtUtils]: Spent 179.00 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