/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 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:38:04,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:38:04,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:38:04,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:38:04,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:38:04,481 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:38:04,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:38:04,482 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:38:04,482 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:38:04,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:38:04,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:38:04,484 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:38:04,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:38:04,484 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:38:04,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:38:04,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:38:04,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:38:04,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:38:04,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:38:04,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:38:04,486 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:38:04,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:38:04,486 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:38:04,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:38:04,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:38:04,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:38:04,487 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:38:04,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:38:04,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:38:04,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:38:04,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:38:04,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:38:04,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:38:04,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:38:04,489 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:38:04,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:38:04,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:38:04,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:38:04,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:38:04,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:38:04,822 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:38:04,823 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:38:04,824 INFO L432 ainManager$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 [2021-07-09 17:38:04,824 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl' [2021-07-09 17:38:04,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:38:04,877 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:38:04,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:38:04,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:38:04,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:38:04,894 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 09.07 05:38:04" (1/1) ... [2021-07-09 17:38:04,916 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 09.07 05:38:04" (1/1) ... [2021-07-09 17:38:04,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:38:04,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:38:04,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:38:04,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:38:04,933 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 09.07 05:38:04" (1/1) ... [2021-07-09 17:38:04,933 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 09.07 05:38:04" (1/1) ... [2021-07-09 17:38:04,947 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 09.07 05:38:04" (1/1) ... [2021-07-09 17:38:04,947 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 09.07 05:38:04" (1/1) ... [2021-07-09 17:38:04,964 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 09.07 05:38:04" (1/1) ... [2021-07-09 17:38:04,967 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 09.07 05:38:04" (1/1) ... [2021-07-09 17:38:04,969 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 09.07 05:38:04" (1/1) ... [2021-07-09 17:38:04,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:38:04,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:38:04,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:38:04,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:38:04,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:38:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:38:05,060 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:38:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:38:05,061 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:38:05,061 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:38:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:38:05,061 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:38:05,062 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:38:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:38:05,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:38:05,063 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:38:05,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:38:05,653 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-07-09 17:38:05,655 INFO L202 PluginConnector]: Adding new model poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:38:05 BoogieIcfgContainer [2021-07-09 17:38:05,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:38:05,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:38:05,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:38:05,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:38:05,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:38:04" (1/2) ... [2021-07-09 17:38:05,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@410d48c0 and model type poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:38:05, skipping insertion in model container [2021-07-09 17:38:05,662 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 09.07 05:38:05" (2/2) ... [2021-07-09 17:38:05,666 INFO L111 eAbstractionObserver]: Analyzing ICFG poker-hand-symm.wvr.bpl [2021-07-09 17:38:05,670 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:38:05,671 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:38:05,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:38:05,672 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:38:05,708 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:38:05,734 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:38:05,763 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:38:05,763 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:38:05,763 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:38:05,763 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:38:05,763 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:38:05,764 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:38:05,764 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:38:05,764 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:38:05,779 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 26 transitions, 68 flow [2021-07-09 17:38:05,795 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) [2021-07-09 17:38:05,798 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) [2021-07-09 17:38:05,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:38:05,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:05,805 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:05,805 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:05,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:05,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1990166855, now seen corresponding path program 1 times [2021-07-09 17:38:05,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:05,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911968046] [2021-07-09 17:38:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:06,752 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 121 [2021-07-09 17:38:07,358 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2021-07-09 17:38:07,825 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 48 [2021-07-09 17:38:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:07,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:07,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911968046] [2021-07-09 17:38:07,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911968046] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:38:07,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:38:07,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:38:07,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341113009] [2021-07-09 17:38:07,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:38:07,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:07,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:38:07,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:38:07,928 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) [2021-07-09 17:38:08,180 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 17:38:08,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:08,229 INFO L93 Difference]: Finished difference Result 66 states and 158 transitions. [2021-07-09 17:38:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:38:08,230 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 [2021-07-09 17:38:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:08,238 INFO L225 Difference]: With dead ends: 66 [2021-07-09 17:38:08,238 INFO L226 Difference]: Without dead ends: 59 [2021-07-09 17:38:08,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 789.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:38:08,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-09 17:38:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2021-07-09 17:38:08,291 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) [2021-07-09 17:38:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 121 transitions. [2021-07-09 17:38:08,295 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 121 transitions. Word has length 10 [2021-07-09 17:38:08,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:08,295 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 121 transitions. [2021-07-09 17:38:08,296 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) [2021-07-09 17:38:08,296 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 121 transitions. [2021-07-09 17:38:08,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:38:08,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:08,298 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:08,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:38:08,299 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:08,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1977673933, now seen corresponding path program 2 times [2021-07-09 17:38:08,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:08,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386377926] [2021-07-09 17:38:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:08,814 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2021-07-09 17:38:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:08,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:08,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386377926] [2021-07-09 17:38:08,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386377926] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:38:08,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:38:08,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:38:08,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812156251] [2021-07-09 17:38:08,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:38:08,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:08,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:38:08,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:38:08,888 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) [2021-07-09 17:38:09,091 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-09 17:38:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,114 INFO L93 Difference]: Finished difference Result 66 states and 156 transitions. [2021-07-09 17:38:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:38:09,115 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 [2021-07-09 17:38:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,115 INFO L225 Difference]: With dead ends: 66 [2021-07-09 17:38:09,116 INFO L226 Difference]: Without dead ends: 59 [2021-07-09 17:38:09,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 541.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:38:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-09 17:38:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-07-09 17:38:09,121 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) [2021-07-09 17:38:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 126 transitions. [2021-07-09 17:38:09,122 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 126 transitions. Word has length 10 [2021-07-09 17:38:09,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,122 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 126 transitions. [2021-07-09 17:38:09,122 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) [2021-07-09 17:38:09,122 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 126 transitions. [2021-07-09 17:38:09,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:38:09,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,123 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:09,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:38:09,124 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:09,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1880928136, now seen corresponding path program 1 times [2021-07-09 17:38:09,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:09,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521389147] [2021-07-09 17:38:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:09,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:09,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:09,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521389147] [2021-07-09 17:38:09,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521389147] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:38:09,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:38:09,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:38:09,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517741182] [2021-07-09 17:38:09,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:38:09,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:09,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:38:09,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,139 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) [2021-07-09 17:38:09,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,145 INFO L93 Difference]: Finished difference Result 52 states and 141 transitions. [2021-07-09 17:38:09,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:38:09,145 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 [2021-07-09 17:38:09,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,146 INFO L225 Difference]: With dead ends: 52 [2021-07-09 17:38:09,146 INFO L226 Difference]: Without dead ends: 52 [2021-07-09 17:38:09,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-07-09 17:38:09,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-07-09 17:38:09,151 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) [2021-07-09 17:38:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 141 transitions. [2021-07-09 17:38:09,152 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 141 transitions. Word has length 11 [2021-07-09 17:38:09,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,152 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 141 transitions. [2021-07-09 17:38:09,152 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) [2021-07-09 17:38:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 141 transitions. [2021-07-09 17:38:09,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:38:09,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,153 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:09,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:38:09,154 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:09,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:09,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1648216420, now seen corresponding path program 1 times [2021-07-09 17:38:09,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:09,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659904269] [2021-07-09 17:38:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:09,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:09,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659904269] [2021-07-09 17:38:09,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659904269] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:38:09,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:38:09,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:38:09,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611269261] [2021-07-09 17:38:09,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:38:09,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:09,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:38:09,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,170 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) [2021-07-09 17:38:09,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,178 INFO L93 Difference]: Finished difference Result 58 states and 156 transitions. [2021-07-09 17:38:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:38:09,180 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 [2021-07-09 17:38:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,181 INFO L225 Difference]: With dead ends: 58 [2021-07-09 17:38:09,181 INFO L226 Difference]: Without dead ends: 58 [2021-07-09 17:38:09,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-07-09 17:38:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-07-09 17:38:09,186 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) [2021-07-09 17:38:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 156 transitions. [2021-07-09 17:38:09,187 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 156 transitions. Word has length 11 [2021-07-09 17:38:09,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,187 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 156 transitions. [2021-07-09 17:38:09,187 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) [2021-07-09 17:38:09,187 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 156 transitions. [2021-07-09 17:38:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:38:09,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,188 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:09,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:38:09,188 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:09,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1504532924, now seen corresponding path program 1 times [2021-07-09 17:38:09,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:09,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85580548] [2021-07-09 17:38:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:09,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:09,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85580548] [2021-07-09 17:38:09,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85580548] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:38:09,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:38:09,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:38:09,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844443472] [2021-07-09 17:38:09,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:38:09,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:09,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:38:09,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,205 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) [2021-07-09 17:38:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,211 INFO L93 Difference]: Finished difference Result 66 states and 175 transitions. [2021-07-09 17:38:09,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:38:09,212 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 [2021-07-09 17:38:09,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,213 INFO L225 Difference]: With dead ends: 66 [2021-07-09 17:38:09,213 INFO L226 Difference]: Without dead ends: 66 [2021-07-09 17:38:09,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-09 17:38:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-07-09 17:38:09,218 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) [2021-07-09 17:38:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 175 transitions. [2021-07-09 17:38:09,218 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 175 transitions. Word has length 11 [2021-07-09 17:38:09,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,219 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 175 transitions. [2021-07-09 17:38:09,219 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) [2021-07-09 17:38:09,219 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 175 transitions. [2021-07-09 17:38:09,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:38:09,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,220 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:09,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:38:09,220 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:09,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:09,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1535932638, now seen corresponding path program 1 times [2021-07-09 17:38:09,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:09,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033904025] [2021-07-09 17:38:09,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:09,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:09,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033904025] [2021-07-09 17:38:09,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033904025] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:38:09,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:38:09,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:38:09,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383032177] [2021-07-09 17:38:09,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:38:09,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:09,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:38:09,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,237 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) [2021-07-09 17:38:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,245 INFO L93 Difference]: Finished difference Result 74 states and 194 transitions. [2021-07-09 17:38:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:38:09,246 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 [2021-07-09 17:38:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,247 INFO L225 Difference]: With dead ends: 74 [2021-07-09 17:38:09,247 INFO L226 Difference]: Without dead ends: 74 [2021-07-09 17:38:09,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-07-09 17:38:09,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-07-09 17:38:09,251 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) [2021-07-09 17:38:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 194 transitions. [2021-07-09 17:38:09,252 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 194 transitions. Word has length 11 [2021-07-09 17:38:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,252 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 194 transitions. [2021-07-09 17:38:09,252 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) [2021-07-09 17:38:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 194 transitions. [2021-07-09 17:38:09,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:38:09,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,253 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:09,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:38:09,253 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:09,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:09,254 INFO L82 PathProgramCache]: Analyzing trace with hash -375396698, now seen corresponding path program 1 times [2021-07-09 17:38:09,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:09,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867326090] [2021-07-09 17:38:09,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:38:09,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:09,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867326090] [2021-07-09 17:38:09,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867326090] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:38:09,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:38:09,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:38:09,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447767186] [2021-07-09 17:38:09,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:38:09,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:09,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:38:09,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,290 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) [2021-07-09 17:38:09,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,313 INFO L93 Difference]: Finished difference Result 100 states and 228 transitions. [2021-07-09 17:38:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:38:09,314 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 [2021-07-09 17:38:09,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,316 INFO L225 Difference]: With dead ends: 100 [2021-07-09 17:38:09,316 INFO L226 Difference]: Without dead ends: 100 [2021-07-09 17:38:09,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-09 17:38:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-07-09 17:38:09,333 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) [2021-07-09 17:38:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2021-07-09 17:38:09,334 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 12 [2021-07-09 17:38:09,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,334 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2021-07-09 17:38:09,334 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) [2021-07-09 17:38:09,334 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2021-07-09 17:38:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:38:09,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,335 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:09,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:38:09,335 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:09,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:09,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1248628485, now seen corresponding path program 1 times [2021-07-09 17:38:09,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:09,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091530020] [2021-07-09 17:38:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:38:09,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:09,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091530020] [2021-07-09 17:38:09,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091530020] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:38:09,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:38:09,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:38:09,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920219083] [2021-07-09 17:38:09,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:38:09,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:09,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:38:09,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,393 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) [2021-07-09 17:38:09,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,443 INFO L93 Difference]: Finished difference Result 82 states and 165 transitions. [2021-07-09 17:38:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:38:09,444 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 [2021-07-09 17:38:09,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,445 INFO L225 Difference]: With dead ends: 82 [2021-07-09 17:38:09,445 INFO L226 Difference]: Without dead ends: 82 [2021-07-09 17:38:09,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-09 17:38:09,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2021-07-09 17:38:09,448 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) [2021-07-09 17:38:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 155 transitions. [2021-07-09 17:38:09,449 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 155 transitions. Word has length 12 [2021-07-09 17:38:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,449 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 155 transitions. [2021-07-09 17:38:09,449 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) [2021-07-09 17:38:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 155 transitions. [2021-07-09 17:38:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:38:09,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,450 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:09,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 17:38:09,450 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:09,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:09,451 INFO L82 PathProgramCache]: Analyzing trace with hash -579329596, now seen corresponding path program 1 times [2021-07-09 17:38:09,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:09,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140044980] [2021-07-09 17:38:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:38:09,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:09,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140044980] [2021-07-09 17:38:09,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140044980] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:38:09,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:38:09,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:38:09,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147009397] [2021-07-09 17:38:09,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:38:09,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:09,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:38:09,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,478 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) [2021-07-09 17:38:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,492 INFO L93 Difference]: Finished difference Result 82 states and 160 transitions. [2021-07-09 17:38:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:38:09,493 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 [2021-07-09 17:38:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,493 INFO L225 Difference]: With dead ends: 82 [2021-07-09 17:38:09,493 INFO L226 Difference]: Without dead ends: 82 [2021-07-09 17:38:09,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-09 17:38:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-07-09 17:38:09,496 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) [2021-07-09 17:38:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 139 transitions. [2021-07-09 17:38:09,496 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 139 transitions. Word has length 12 [2021-07-09 17:38:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,497 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 139 transitions. [2021-07-09 17:38:09,497 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) [2021-07-09 17:38:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 139 transitions. [2021-07-09 17:38:09,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:38:09,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,498 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:09,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 17:38:09,498 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:09,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:09,499 INFO L82 PathProgramCache]: Analyzing trace with hash 339573799, now seen corresponding path program 1 times [2021-07-09 17:38:09,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:09,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224684586] [2021-07-09 17:38:09,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:38:09,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:09,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224684586] [2021-07-09 17:38:09,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224684586] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:38:09,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:38:09,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:38:09,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75644673] [2021-07-09 17:38:09,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:38:09,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:09,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:38:09,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,536 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) [2021-07-09 17:38:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,558 INFO L93 Difference]: Finished difference Result 82 states and 155 transitions. [2021-07-09 17:38:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:38:09,558 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 [2021-07-09 17:38:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,559 INFO L225 Difference]: With dead ends: 82 [2021-07-09 17:38:09,559 INFO L226 Difference]: Without dead ends: 75 [2021-07-09 17:38:09,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:38:09,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-09 17:38:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-07-09 17:38:09,561 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) [2021-07-09 17:38:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 136 transitions. [2021-07-09 17:38:09,562 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 136 transitions. Word has length 12 [2021-07-09 17:38:09,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,562 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 136 transitions. [2021-07-09 17:38:09,562 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) [2021-07-09 17:38:09,562 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 136 transitions. [2021-07-09 17:38:09,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:38:09,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,563 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:09,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-09 17:38:09,563 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:09,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1848204445, now seen corresponding path program 1 times [2021-07-09 17:38:09,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:09,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790783330] [2021-07-09 17:38:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:09,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:09,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790783330] [2021-07-09 17:38:09,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790783330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:09,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535276460] [2021-07-09 17:38:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:09,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:10,122 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-07-09 17:38:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:10,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535276460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:10,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:10,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:38:10,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632019395] [2021-07-09 17:38:10,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:10,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:10,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:10,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:10,498 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) [2021-07-09 17:38:10,668 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-07-09 17:38:10,929 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-07-09 17:38:11,160 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-07-09 17:38:11,403 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-07-09 17:38:11,653 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-07-09 17:38:11,910 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-07-09 17:38:12,090 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-07-09 17:38:12,306 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-09 17:38:12,518 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-07-09 17:38:12,660 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-07-09 17:38:12,857 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-07-09 17:38:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:12,891 INFO L93 Difference]: Finished difference Result 133 states and 272 transitions. [2021-07-09 17:38:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:12,901 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 [2021-07-09 17:38:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:12,902 INFO L225 Difference]: With dead ends: 133 [2021-07-09 17:38:12,902 INFO L226 Difference]: Without dead ends: 119 [2021-07-09 17:38:12,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2700.4ms TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:12,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-09 17:38:12,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2021-07-09 17:38:12,911 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) [2021-07-09 17:38:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-07-09 17:38:12,913 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 14 [2021-07-09 17:38:12,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:12,913 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-07-09 17:38:12,913 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) [2021-07-09 17:38:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-07-09 17:38:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:38:12,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:12,914 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:13,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 17:38:13,138 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:13,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1124293829, now seen corresponding path program 2 times [2021-07-09 17:38:13,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:13,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853202117] [2021-07-09 17:38:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:13,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:13,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853202117] [2021-07-09 17:38:13,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853202117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:13,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120708985] [2021-07-09 17:38:13,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:13,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:13,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:13,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:13,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:13,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120708985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:13,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:13,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:38:13,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118144630] [2021-07-09 17:38:13,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:13,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:13,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:13,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:13,966 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) [2021-07-09 17:38:14,184 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-07-09 17:38:14,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:14,378 INFO L93 Difference]: Finished difference Result 105 states and 213 transitions. [2021-07-09 17:38:14,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:14,378 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 [2021-07-09 17:38:14,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:14,379 INFO L225 Difference]: With dead ends: 105 [2021-07-09 17:38:14,379 INFO L226 Difference]: Without dead ends: 98 [2021-07-09 17:38:14,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 708.6ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-09 17:38:14,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-07-09 17:38:14,382 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) [2021-07-09 17:38:14,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2021-07-09 17:38:14,383 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 14 [2021-07-09 17:38:14,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:14,383 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2021-07-09 17:38:14,383 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) [2021-07-09 17:38:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2021-07-09 17:38:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:38:14,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:14,383 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:14,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:38:14,605 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1311401613, now seen corresponding path program 3 times [2021-07-09 17:38:14,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:14,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274802926] [2021-07-09 17:38:14,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:14,810 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-07-09 17:38:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:14,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:14,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274802926] [2021-07-09 17:38:14,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274802926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:14,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384504416] [2021-07-09 17:38:14,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:14,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:14,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:15,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384504416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:15,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:15,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:38:15,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187135166] [2021-07-09 17:38:15,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:15,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:15,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:15,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:15,162 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) [2021-07-09 17:38:15,413 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-07-09 17:38:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:15,631 INFO L93 Difference]: Finished difference Result 108 states and 218 transitions. [2021-07-09 17:38:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:15,632 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 [2021-07-09 17:38:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:15,633 INFO L225 Difference]: With dead ends: 108 [2021-07-09 17:38:15,633 INFO L226 Difference]: Without dead ends: 101 [2021-07-09 17:38:15,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 699.4ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:15,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-09 17:38:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-07-09 17:38:15,635 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) [2021-07-09 17:38:15,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-07-09 17:38:15,636 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 14 [2021-07-09 17:38:15,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:15,636 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-07-09 17:38:15,636 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) [2021-07-09 17:38:15,636 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-07-09 17:38:15,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:38:15,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:15,637 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:15,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:38:15,859 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:15,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:15,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1308775837, now seen corresponding path program 4 times [2021-07-09 17:38:15,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:15,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715438216] [2021-07-09 17:38:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:16,078 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-09 17:38:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:16,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:16,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715438216] [2021-07-09 17:38:16,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715438216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:16,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112662721] [2021-07-09 17:38:16,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:16,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:16,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:16,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:38:16,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:16,428 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-07-09 17:38:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:16,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112662721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:16,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:16,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:38:16,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995496497] [2021-07-09 17:38:16,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:16,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:16,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:16,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:16,575 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) [2021-07-09 17:38:16,705 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-09 17:38:17,046 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-09 17:38:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:17,211 INFO L93 Difference]: Finished difference Result 120 states and 237 transitions. [2021-07-09 17:38:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:17,212 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 [2021-07-09 17:38:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:17,212 INFO L225 Difference]: With dead ends: 120 [2021-07-09 17:38:17,212 INFO L226 Difference]: Without dead ends: 113 [2021-07-09 17:38:17,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 978.5ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-09 17:38:17,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2021-07-09 17:38:17,215 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) [2021-07-09 17:38:17,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2021-07-09 17:38:17,216 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 14 [2021-07-09 17:38:17,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:17,216 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2021-07-09 17:38:17,216 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) [2021-07-09 17:38:17,216 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2021-07-09 17:38:17,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:38:17,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:17,216 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:17,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:17,433 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:17,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:17,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1047840443, now seen corresponding path program 5 times [2021-07-09 17:38:17,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:17,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427208807] [2021-07-09 17:38:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:17,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:17,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427208807] [2021-07-09 17:38:17,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427208807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:17,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392716196] [2021-07-09 17:38:17,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:17,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:17,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:17,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:17,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:17,857 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 17:38:21,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,823 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 [2021-07-09 17:38:21,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,842 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 [2021-07-09 17:38:21,843 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,851 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,858 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,859 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,869 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,879 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,887 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,896 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,904 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,910 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,911 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,919 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,929 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 [2021-07-09 17:38:21,930 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,939 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,949 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 [2021-07-09 17:38:21,950 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,961 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,970 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 [2021-07-09 17:38:21,970 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,980 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:21,988 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,996 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 [2021-07-09 17:38:21,997 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,005 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,013 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,021 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,030 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 [2021-07-09 17:38:22,031 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,039 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,049 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,056 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,065 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 [2021-07-09 17:38:22,065 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,073 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,081 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,088 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,094 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,098 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,099 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,104 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,110 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,115 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,121 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 [2021-07-09 17:38:22,122 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,130 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,139 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,146 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,152 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 [2021-07-09 17:38:22,153 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,160 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,166 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,171 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,177 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 [2021-07-09 17:38:22,178 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,184 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,189 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,194 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,199 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,207 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 [2021-07-09 17:38:22,208 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,216 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,222 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 [2021-07-09 17:38:22,223 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,229 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,235 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,243 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,247 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,252 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,257 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,261 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,267 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,272 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,277 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,278 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,284 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,292 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 [2021-07-09 17:38:22,293 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,299 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,305 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,311 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,311 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,317 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,323 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,328 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,328 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,333 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,339 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,343 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,344 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,350 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,354 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,359 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,365 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,371 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,376 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,381 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,385 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,389 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,511 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-07-09 17:38:22,511 INFO L628 ElimStorePlain]: treesize reduction 34, result has 77.5 percent of original size [2021-07-09 17:38:22,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-09 17:38:22,518 INFO L550 ElimStorePlain]: Start of recursive call 86: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:22,522 INFO L550 ElimStorePlain]: Start of recursive call 87: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,526 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 [2021-07-09 17:38:22,527 INFO L550 ElimStorePlain]: Start of recursive call 88: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,531 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 [2021-07-09 17:38:22,532 INFO L550 ElimStorePlain]: Start of recursive call 89: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:22,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:38:22,568 INFO L247 ElimStorePlain]: Needed 89 recursive calls to eliminate 3 variables, input treesize:4422, output treesize:38 [2021-07-09 17:38:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:22,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392716196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:22,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:22,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:38:22,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613551080] [2021-07-09 17:38:22,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:38:22,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:22,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:38:22,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:38:22,636 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) [2021-07-09 17:38:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:22,841 INFO L93 Difference]: Finished difference Result 93 states and 184 transitions. [2021-07-09 17:38:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:38:22,841 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 [2021-07-09 17:38:22,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:22,842 INFO L225 Difference]: With dead ends: 93 [2021-07-09 17:38:22,842 INFO L226 Difference]: Without dead ends: 82 [2021-07-09 17:38:22,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:22,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-09 17:38:22,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-07-09 17:38:22,844 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) [2021-07-09 17:38:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-07-09 17:38:22,844 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 14 [2021-07-09 17:38:22,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:22,845 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-07-09 17:38:22,845 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) [2021-07-09 17:38:22,845 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-07-09 17:38:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:38:22,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:22,845 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:23,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 17:38:23,068 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:23,068 INFO L82 PathProgramCache]: Analyzing trace with hash 685771365, now seen corresponding path program 1 times [2021-07-09 17:38:23,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:23,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264495003] [2021-07-09 17:38:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:23,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:23,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264495003] [2021-07-09 17:38:23,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264495003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:23,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635811551] [2021-07-09 17:38:23,356 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 [2021-07-09 17:38:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:23,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:38:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:23,657 WARN L205 SmtUtils]: Spent 204.00 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