/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/unroll-cond-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:00:35,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:00:35,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:00:35,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:00:35,572 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-12 19:00:35,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:00:35,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:00:35,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:00:35,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:00:35,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:00:35,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:00:35,609 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:00:35,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:00:35,609 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:00:35,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:00:35,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:00:35,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:00:35,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:00:35,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:00:35,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:00:35,611 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:00:35,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:00:35,611 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:00:35,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:00:35,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:00:35,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:00:35,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:00:35,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:00:35,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:00:35,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:00:35,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:00:35,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:00:35,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:00:35,623 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:00:35,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:00:35,623 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:00:35,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:00:35,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:00:35,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:00:35,979 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:00:35,980 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:00:35,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-5.wvr.bpl [2021-08-12 19:00:35,981 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-5.wvr.bpl' [2021-08-12 19:00:36,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:00:36,037 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:00:36,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:00:36,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:00:36,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:00:36,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:36" (1/1) ... [2021-08-12 19:00:36,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:36" (1/1) ... [2021-08-12 19:00:36,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:00:36,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:00:36,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:00:36,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:00:36,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:36" (1/1) ... [2021-08-12 19:00:36,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:36" (1/1) ... [2021-08-12 19:00:36,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:36" (1/1) ... [2021-08-12 19:00:36,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:36" (1/1) ... [2021-08-12 19:00:36,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:36" (1/1) ... [2021-08-12 19:00:36,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:36" (1/1) ... [2021-08-12 19:00:36,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:36" (1/1) ... [2021-08-12 19:00:36,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:00:36,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:00:36,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:00:36,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:00:36,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:00:36,152 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:00:36,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:00:36,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:00:36,153 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:00:36,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:00:36,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:00:36,153 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:00:36,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:00:36,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:00:36,155 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:00:36,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:00:36,529 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-12 19:00:36,530 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-12 19:00:36,531 INFO L202 PluginConnector]: Adding new model unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:00:36 BoogieIcfgContainer [2021-08-12 19:00:36,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:00:36,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:00:36,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:00:36,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:00:36,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:36" (1/2) ... [2021-08-12 19:00:36,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565e0aee and model type unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:00:36, skipping insertion in model container [2021-08-12 19:00:36,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:00:36" (2/2) ... [2021-08-12 19:00:36,538 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.bpl [2021-08-12 19:00:36,543 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:00:36,543 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:00:36,544 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:00:36,572 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-12 19:00:36,592 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 19:00:36,622 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:00:36,623 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:00:36,623 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:00:36,624 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:00:36,624 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:00:36,624 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:00:36,624 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:00:36,628 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:00:36,648 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-08-12 19:00:36,657 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:36,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 19:00:36,665 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:36,666 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:36,666 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:36,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:36,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1938062105, now seen corresponding path program 1 times [2021-08-12 19:00:36,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:36,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590246424] [2021-08-12 19:00:36,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:36,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:36,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590246424] [2021-08-12 19:00:36,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590246424] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:00:36,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:00:36,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:00:36,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227647191] [2021-08-12 19:00:36,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:00:36,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:36,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:00:36,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:00:36,922 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:36,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:36,991 INFO L93 Difference]: Finished difference Result 37 states and 61 transitions. [2021-08-12 19:00:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:00:36,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-12 19:00:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:37,000 INFO L225 Difference]: With dead ends: 37 [2021-08-12 19:00:37,000 INFO L226 Difference]: Without dead ends: 18 [2021-08-12 19:00:37,003 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:00:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-12 19:00:37,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-12 19:00:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-08-12 19:00:37,031 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-08-12 19:00:37,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:37,031 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-08-12 19:00:37,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-08-12 19:00:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-12 19:00:37,033 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:37,033 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:37,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:00:37,033 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:37,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:37,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1613321831, now seen corresponding path program 2 times [2021-08-12 19:00:37,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:37,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821489972] [2021-08-12 19:00:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:37,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:37,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821489972] [2021-08-12 19:00:37,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821489972] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:00:37,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:00:37,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:00:37,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744447898] [2021-08-12 19:00:37,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:00:37,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:37,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:00:37,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:00:37,155 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:37,210 INFO L93 Difference]: Finished difference Result 30 states and 53 transitions. [2021-08-12 19:00:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:00:37,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-12 19:00:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:37,212 INFO L225 Difference]: With dead ends: 30 [2021-08-12 19:00:37,212 INFO L226 Difference]: Without dead ends: 23 [2021-08-12 19:00:37,213 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:00:37,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-12 19:00:37,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-08-12 19:00:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-08-12 19:00:37,221 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-08-12 19:00:37,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:37,222 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-08-12 19:00:37,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:37,222 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-08-12 19:00:37,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 19:00:37,222 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:37,223 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:37,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 19:00:37,223 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:37,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:37,224 INFO L82 PathProgramCache]: Analyzing trace with hash -104131845, now seen corresponding path program 1 times [2021-08-12 19:00:37,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:37,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809519828] [2021-08-12 19:00:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:39,202 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 5498 DAG size of output: 50 [2021-08-12 19:00:39,391 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-08-12 19:00:40,156 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 5496 DAG size of output: 12 [2021-08-12 19:00:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:40,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:40,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809519828] [2021-08-12 19:00:40,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809519828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:40,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038514930] [2021-08-12 19:00:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:40,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:00:40,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:41,385 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 2125 DAG size of output: 13 [2021-08-12 19:00:41,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:00:41,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:00:41,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:41,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:00:41,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-08-12 19:00:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:41,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038514930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:41,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:41,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-12 19:00:41,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111785088] [2021-08-12 19:00:41,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:00:41,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:41,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:00:41,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:00:41,470 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:41,525 INFO L93 Difference]: Finished difference Result 39 states and 66 transitions. [2021-08-12 19:00:41,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:00:41,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-12 19:00:41,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:41,526 INFO L225 Difference]: With dead ends: 39 [2021-08-12 19:00:41,526 INFO L226 Difference]: Without dead ends: 22 [2021-08-12 19:00:41,526 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:00:41,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-12 19:00:41,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-12 19:00:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-08-12 19:00:41,530 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-08-12 19:00:41,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:41,530 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-08-12 19:00:41,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:41,530 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-08-12 19:00:41,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 19:00:41,531 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:41,531 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:41,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-12 19:00:41,754 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:41,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:41,755 INFO L82 PathProgramCache]: Analyzing trace with hash 639451515, now seen corresponding path program 2 times [2021-08-12 19:00:41,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:41,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853830642] [2021-08-12 19:00:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:42,619 WARN L205 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 5498 DAG size of output: 50 [2021-08-12 19:00:42,788 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-08-12 19:00:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:42,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:42,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853830642] [2021-08-12 19:00:42,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853830642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:42,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909633057] [2021-08-12 19:00:42,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:42,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:00:42,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:42,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:00:42,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:44,165 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 2127 DAG size of output: 38 [2021-08-12 19:00:44,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:00:44,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:00:44,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:44,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-08-12 19:00:44,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-08-12 19:00:44,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:44,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-08-12 19:00:44,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-08-12 19:00:44,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:00:44,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 17 treesize of output 64 [2021-08-12 19:00:44,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-08-12 19:00:44,411 INFO L628 ElimStorePlain]: treesize reduction 61, result has 26.5 percent of original size [2021-08-12 19:00:44,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:00:44,413 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:108, output treesize:22 [2021-08-12 19:00:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:44,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909633057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:44,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:44,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-12 19:00:44,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113509707] [2021-08-12 19:00:44,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:00:44,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:44,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:00:44,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:00:44,448 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:44,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:44,520 INFO L93 Difference]: Finished difference Result 37 states and 70 transitions. [2021-08-12 19:00:44,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:00:44,521 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-12 19:00:44,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:44,522 INFO L225 Difference]: With dead ends: 37 [2021-08-12 19:00:44,522 INFO L226 Difference]: Without dead ends: 30 [2021-08-12 19:00:44,522 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:00:44,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-12 19:00:44,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-08-12 19:00:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-08-12 19:00:44,525 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-08-12 19:00:44,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:44,525 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-08-12 19:00:44,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-08-12 19:00:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 19:00:44,526 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:44,526 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:44,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:44,749 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:44,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:44,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1490595647, now seen corresponding path program 3 times [2021-08-12 19:00:44,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:44,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107192600] [2021-08-12 19:00:44,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:44,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:44,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107192600] [2021-08-12 19:00:44,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107192600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:44,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929371759] [2021-08-12 19:00:44,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:44,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:00:44,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:44,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:00:44,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:32,889 WARN L205 SmtUtils]: Spent 3.78 m on a formula simplification. DAG size of input: 112621 DAG size of output: 44 [2021-08-12 19:04:33,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:33,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-08-12 19:04:33,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:04:33,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:33,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-08-12 19:04:33,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-08-12 19:04:33,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:04:33,021 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:04:33,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:33,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 17 treesize of output 64 [2021-08-12 19:04:33,072 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-08-12 19:04:33,136 INFO L628 ElimStorePlain]: treesize reduction 58, result has 27.5 percent of original size [2021-08-12 19:04:33,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:04:33,137 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:105, output treesize:22 [2021-08-12 19:04:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:33,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929371759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:33,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:33,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-12 19:04:33,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825152389] [2021-08-12 19:04:33,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:04:33,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:33,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:04:33,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:04:33,168 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:33,284 INFO L93 Difference]: Finished difference Result 53 states and 91 transitions. [2021-08-12 19:04:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:04:33,284 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-12 19:04:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:33,285 INFO L225 Difference]: With dead ends: 53 [2021-08-12 19:04:33,285 INFO L226 Difference]: Without dead ends: 41 [2021-08-12 19:04:33,286 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:04:33,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-12 19:04:33,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-08-12 19:04:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-08-12 19:04:33,290 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-08-12 19:04:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:33,290 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-08-12 19:04:33,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-08-12 19:04:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 19:04:33,290 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:33,291 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:33,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:33,492 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:33,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:33,493 INFO L82 PathProgramCache]: Analyzing trace with hash 829331864, now seen corresponding path program 1 times [2021-08-12 19:04:33,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:33,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234584395] [2021-08-12 19:04:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:33,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:33,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234584395] [2021-08-12 19:04:33,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234584395] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:04:33,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:04:33,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:04:33,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844721241] [2021-08-12 19:04:33,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:04:33,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:33,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:04:33,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:04:33,512 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:33,526 INFO L93 Difference]: Finished difference Result 38 states and 67 transitions. [2021-08-12 19:04:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:04:33,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-12 19:04:33,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:33,527 INFO L225 Difference]: With dead ends: 38 [2021-08-12 19:04:33,528 INFO L226 Difference]: Without dead ends: 29 [2021-08-12 19:04:33,528 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:04:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-12 19:04:33,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-08-12 19:04:33,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:33,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-08-12 19:04:33,531 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-08-12 19:04:33,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:33,531 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-08-12 19:04:33,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:33,531 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-08-12 19:04:33,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 19:04:33,532 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:33,532 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:33,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-08-12 19:04:33,532 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1012365145, now seen corresponding path program 4 times [2021-08-12 19:04:33,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:33,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178437606] [2021-08-12 19:04:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:34,066 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 2846 DAG size of output: 46 [2021-08-12 19:04:35,052 WARN L205 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 5518 DAG size of output: 38 [2021-08-12 19:04:35,991 WARN L205 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 5516 DAG size of output: 13 [2021-08-12 19:04:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:36,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:36,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178437606] [2021-08-12 19:04:36,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178437606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:36,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007828863] [2021-08-12 19:04:36,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:36,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:04:36,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:36,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:04:36,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:37,052 WARN L205 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 2125 DAG size of output: 15 [2021-08-12 19:04:37,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:37,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-08-12 19:04:37,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:04:37,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:37,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:04:37,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-08-12 19:04:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:37,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007828863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:37,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:37,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-12 19:04:37,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357137322] [2021-08-12 19:04:37,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:04:37,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:37,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:04:37,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:04:37,074 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:37,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:37,138 INFO L93 Difference]: Finished difference Result 46 states and 80 transitions. [2021-08-12 19:04:37,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:04:37,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-12 19:04:37,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:37,139 INFO L225 Difference]: With dead ends: 46 [2021-08-12 19:04:37,139 INFO L226 Difference]: Without dead ends: 29 [2021-08-12 19:04:37,139 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:04:37,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-12 19:04:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-12 19:04:37,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:37,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-08-12 19:04:37,144 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-08-12 19:04:37,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:37,144 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-08-12 19:04:37,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-08-12 19:04:37,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 19:04:37,144 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:37,145 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:37,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:37,349 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:37,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:37,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1755948505, now seen corresponding path program 5 times [2021-08-12 19:04:37,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:37,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832609967] [2021-08-12 19:04:37,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:38,326 WARN L205 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 2941 DAG size of output: 54 [2021-08-12 19:04:38,447 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2021-08-12 19:04:40,179 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 5612 DAG size of output: 47 [2021-08-12 19:04:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:40,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:40,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832609967] [2021-08-12 19:04:40,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832609967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:40,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770337834] [2021-08-12 19:04:40,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:40,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:04:40,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:40,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:04:40,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:41,269 WARN L205 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 2127 DAG size of output: 32 [2021-08-12 19:04:41,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:41,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-08-12 19:04:41,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 19:04:41,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:41,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 64 [2021-08-12 19:04:41,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-08-12 19:04:41,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:41,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-08-12 19:04:41,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:04:41,409 INFO L628 ElimStorePlain]: treesize reduction 28, result has 53.3 percent of original size [2021-08-12 19:04:41,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 19:04:41,410 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:85, output treesize:32 [2021-08-12 19:04:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:41,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770337834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:41,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:41,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-12 19:04:41,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103204543] [2021-08-12 19:04:41,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:04:41,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:41,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:04:41,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:04:41,447 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:41,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:41,530 INFO L93 Difference]: Finished difference Result 45 states and 87 transitions. [2021-08-12 19:04:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:04:41,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-12 19:04:41,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:41,531 INFO L225 Difference]: With dead ends: 45 [2021-08-12 19:04:41,532 INFO L226 Difference]: Without dead ends: 38 [2021-08-12 19:04:41,532 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 264.6ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:04:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-12 19:04:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-08-12 19:04:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:41,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-08-12 19:04:41,537 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-08-12 19:04:41,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:41,538 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-08-12 19:04:41,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:41,538 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-08-12 19:04:41,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 19:04:41,538 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:41,538 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:41,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 19:04:41,739 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:41,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1687874659, now seen corresponding path program 6 times [2021-08-12 19:04:41,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:41,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110395228] [2021-08-12 19:04:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:42,271 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 2846 DAG size of output: 46 [2021-08-12 19:04:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:42,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:42,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110395228] [2021-08-12 19:04:42,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110395228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:42,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203072008] [2021-08-12 19:04:42,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:42,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:04:42,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:42,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:04:42,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:42,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:42,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-08-12 19:04:42,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 19:04:42,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:42,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 64 [2021-08-12 19:04:42,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-08-12 19:04:42,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:42,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-08-12 19:04:42,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 19:04:42,671 INFO L628 ElimStorePlain]: treesize reduction 28, result has 53.3 percent of original size [2021-08-12 19:04:42,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 19:04:42,672 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:85, output treesize:32 [2021-08-12 19:04:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:42,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203072008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:42,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:42,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-12 19:04:42,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314817812] [2021-08-12 19:04:42,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:04:42,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:42,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:04:42,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:04:42,703 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:42,854 INFO L93 Difference]: Finished difference Result 63 states and 113 transitions. [2021-08-12 19:04:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:04:42,854 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-12 19:04:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:42,855 INFO L225 Difference]: With dead ends: 63 [2021-08-12 19:04:42,855 INFO L226 Difference]: Without dead ends: 51 [2021-08-12 19:04:42,855 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 244.1ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:04:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-12 19:04:42,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2021-08-12 19:04:42,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-08-12 19:04:42,860 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-08-12 19:04:42,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:42,860 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-08-12 19:04:42,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:42,860 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-08-12 19:04:42,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 19:04:42,861 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:42,861 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:43,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:43,065 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:43,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1945828854, now seen corresponding path program 1 times [2021-08-12 19:04:43,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:43,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956577438] [2021-08-12 19:04:43,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:43,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:43,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956577438] [2021-08-12 19:04:43,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956577438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:43,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625315490] [2021-08-12 19:04:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:43,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:04:43,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:43,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625315490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:43,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:43,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-12 19:04:43,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148656329] [2021-08-12 19:04:43,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:04:43,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:43,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:04:43,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:04:43,141 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:43,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:43,186 INFO L93 Difference]: Finished difference Result 68 states and 117 transitions. [2021-08-12 19:04:43,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:04:43,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-12 19:04:43,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:43,187 INFO L225 Difference]: With dead ends: 68 [2021-08-12 19:04:43,187 INFO L226 Difference]: Without dead ends: 59 [2021-08-12 19:04:43,187 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:04:43,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-12 19:04:43,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2021-08-12 19:04:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-08-12 19:04:43,191 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 12 [2021-08-12 19:04:43,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:43,191 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-08-12 19:04:43,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-08-12 19:04:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 19:04:43,192 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:43,192 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:43,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:43,405 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:43,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:43,405 INFO L82 PathProgramCache]: Analyzing trace with hash -115030948, now seen corresponding path program 2 times [2021-08-12 19:04:43,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:43,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414417921] [2021-08-12 19:04:43,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:43,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:43,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414417921] [2021-08-12 19:04:43,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414417921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:43,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214164547] [2021-08-12 19:04:43,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:43,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:04:43,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:43,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:04:43,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:43,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214164547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:43,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:43,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-12 19:04:43,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931485043] [2021-08-12 19:04:43,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:04:43,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:43,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:04:43,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:04:43,473 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:43,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:43,513 INFO L93 Difference]: Finished difference Result 52 states and 99 transitions. [2021-08-12 19:04:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:04:43,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-12 19:04:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:43,514 INFO L225 Difference]: With dead ends: 52 [2021-08-12 19:04:43,514 INFO L226 Difference]: Without dead ends: 43 [2021-08-12 19:04:43,515 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:04:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-12 19:04:43,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2021-08-12 19:04:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-08-12 19:04:43,518 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 12 [2021-08-12 19:04:43,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:43,518 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-08-12 19:04:43,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-08-12 19:04:43,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 19:04:43,519 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:43,519 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:43,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-12 19:04:43,742 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:43,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:43,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1264033467, now seen corresponding path program 7 times [2021-08-12 19:04:43,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:43,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571347475] [2021-08-12 19:04:43,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:44,269 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 2845 DAG size of output: 42 [2021-08-12 19:04:45,208 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 5510 DAG size of output: 25 [2021-08-12 19:04:46,083 WARN L205 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 5508 DAG size of output: 14 [2021-08-12 19:04:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:46,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:46,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571347475] [2021-08-12 19:04:46,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571347475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:46,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691698872] [2021-08-12 19:04:46,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:46,125 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-12 19:04:46,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:47,087 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 2125 DAG size of output: 16 [2021-08-12 19:04:47,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:47,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-08-12 19:04:47,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:04:47,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:47,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:04:47,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-08-12 19:04:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:47,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691698872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:47,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:47,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:04:47,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658367380] [2021-08-12 19:04:47,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:04:47,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:47,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:04:47,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:04:47,114 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:47,205 INFO L93 Difference]: Finished difference Result 51 states and 95 transitions. [2021-08-12 19:04:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:04:47,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-12 19:04:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:47,206 INFO L225 Difference]: With dead ends: 51 [2021-08-12 19:04:47,206 INFO L226 Difference]: Without dead ends: 34 [2021-08-12 19:04:47,206 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:04:47,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-12 19:04:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-12 19:04:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 69 transitions. [2021-08-12 19:04:47,210 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 69 transitions. Word has length 13 [2021-08-12 19:04:47,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:47,210 INFO L482 AbstractCegarLoop]: Abstraction has 34 states and 69 transitions. [2021-08-12 19:04:47,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 69 transitions. [2021-08-12 19:04:47,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 19:04:47,210 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:47,211 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:47,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:47,417 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:47,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2007616827, now seen corresponding path program 8 times [2021-08-12 19:04:47,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:47,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240399519] [2021-08-12 19:04:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:47,973 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 2845 DAG size of output: 42 [2021-08-12 19:04:48,890 WARN L205 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 5510 DAG size of output: 25 [2021-08-12 19:04:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:48,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:48,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240399519] [2021-08-12 19:04:48,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240399519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:48,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620672869] [2021-08-12 19:04:48,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:49,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:04:49,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:49,004 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-12 19:04:49,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:49,969 WARN L205 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 2127 DAG size of output: 25 [2021-08-12 19:04:49,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:49,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-08-12 19:04:49,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:04:50,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:50,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-08-12 19:04:50,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 19:04:50,059 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-08-12 19:04:50,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:04:50,060 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-08-12 19:04:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:50,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620672869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:50,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:50,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:04:50,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650536560] [2021-08-12 19:04:50,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:04:50,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:50,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:04:50,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:04:50,090 INFO L87 Difference]: Start difference. First operand 34 states and 69 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:50,202 INFO L93 Difference]: Finished difference Result 50 states and 99 transitions. [2021-08-12 19:04:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:04:50,202 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-12 19:04:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:50,203 INFO L225 Difference]: With dead ends: 50 [2021-08-12 19:04:50,203 INFO L226 Difference]: Without dead ends: 43 [2021-08-12 19:04:50,203 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:04:50,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-12 19:04:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2021-08-12 19:04:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 69 transitions. [2021-08-12 19:04:50,207 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 69 transitions. Word has length 13 [2021-08-12 19:04:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:50,207 INFO L482 AbstractCegarLoop]: Abstraction has 34 states and 69 transitions. [2021-08-12 19:04:50,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 69 transitions. [2021-08-12 19:04:50,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 19:04:50,207 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:50,207 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:50,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:50,408 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:50,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1436206337, now seen corresponding path program 9 times [2021-08-12 19:04:50,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:50,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700708420] [2021-08-12 19:04:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:50,954 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 2845 DAG size of output: 42 [2021-08-12 19:04:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:51,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:51,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700708420] [2021-08-12 19:04:51,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700708420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:51,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744405649] [2021-08-12 19:04:51,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:51,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:04:51,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:51,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-12 19:04:51,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:52,088 WARN L205 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 1384 DAG size of output: 45 [2021-08-12 19:04:52,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:52,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-08-12 19:04:52,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:04:52,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:04:52,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-08-12 19:04:52,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 19:04:52,223 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-08-12 19:04:52,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:04:52,224 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-08-12 19:04:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:52,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744405649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:52,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:52,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:04:52,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027515517] [2021-08-12 19:04:52,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:04:52,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:52,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:04:52,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:04:52,254 INFO L87 Difference]: Start difference. First operand 34 states and 69 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:52,429 INFO L93 Difference]: Finished difference Result 75 states and 144 transitions. [2021-08-12 19:04:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:04:52,430 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-12 19:04:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:52,430 INFO L225 Difference]: With dead ends: 75 [2021-08-12 19:04:52,430 INFO L226 Difference]: Without dead ends: 63 [2021-08-12 19:04:52,431 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 283.0ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:04:52,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-12 19:04:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2021-08-12 19:04:52,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:52,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 69 transitions. [2021-08-12 19:04:52,434 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 69 transitions. Word has length 13 [2021-08-12 19:04:52,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:52,434 INFO L482 AbstractCegarLoop]: Abstraction has 34 states and 69 transitions. [2021-08-12 19:04:52,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:52,435 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 69 transitions. [2021-08-12 19:04:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 19:04:52,435 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:52,435 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:52,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-12 19:04:52,649 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:52,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:52,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2097470120, now seen corresponding path program 3 times [2021-08-12 19:04:52,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:52,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831802718] [2021-08-12 19:04:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:52,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:52,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831802718] [2021-08-12 19:04:52,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831802718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:52,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527827929] [2021-08-12 19:04:52,670 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:52,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:04:52,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:52,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:04:52,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:52,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527827929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:52,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:52,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-12 19:04:52,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881729256] [2021-08-12 19:04:52,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:04:52,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:52,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:04:52,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:04:52,735 INFO L87 Difference]: Start difference. First operand 34 states and 69 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:52,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:52,798 INFO L93 Difference]: Finished difference Result 95 states and 168 transitions. [2021-08-12 19:04:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:04:52,798 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-12 19:04:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:52,799 INFO L225 Difference]: With dead ends: 95 [2021-08-12 19:04:52,799 INFO L226 Difference]: Without dead ends: 86 [2021-08-12 19:04:52,799 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:04:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-12 19:04:52,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 35. [2021-08-12 19:04:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:52,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 73 transitions. [2021-08-12 19:04:52,803 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 73 transitions. Word has length 13 [2021-08-12 19:04:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:52,803 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 73 transitions. [2021-08-12 19:04:52,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 73 transitions. [2021-08-12 19:04:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 19:04:52,804 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:52,804 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:53,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-12 19:04:53,017 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:53,017 INFO L82 PathProgramCache]: Analyzing trace with hash 136637374, now seen corresponding path program 4 times [2021-08-12 19:04:53,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:53,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695799422] [2021-08-12 19:04:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:53,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:53,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695799422] [2021-08-12 19:04:53,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695799422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:53,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486382222] [2021-08-12 19:04:53,039 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:53,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:04:53,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:53,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:04:53,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:04:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:53,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486382222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:53,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:04:53,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-12 19:04:53,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679216349] [2021-08-12 19:04:53,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:04:53,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:04:53,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:04:53,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:04:53,089 INFO L87 Difference]: Start difference. First operand 35 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:04:53,141 INFO L93 Difference]: Finished difference Result 73 states and 135 transitions. [2021-08-12 19:04:53,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:04:53,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-12 19:04:53,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:04:53,142 INFO L225 Difference]: With dead ends: 73 [2021-08-12 19:04:53,142 INFO L226 Difference]: Without dead ends: 64 [2021-08-12 19:04:53,142 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:04:53,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-12 19:04:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 35. [2021-08-12 19:04:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 73 transitions. [2021-08-12 19:04:53,145 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 73 transitions. Word has length 13 [2021-08-12 19:04:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:04:53,146 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 73 transitions. [2021-08-12 19:04:53,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:04:53,146 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 73 transitions. [2021-08-12 19:04:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 19:04:53,146 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:04:53,146 INFO L550 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:04:53,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-12 19:04:53,353 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:04:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:04:53,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1085182591, now seen corresponding path program 10 times [2021-08-12 19:04:53,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:04:53,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779749539] [2021-08-12 19:04:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:04:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:04:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:04:53,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:04:53,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779749539] [2021-08-12 19:04:53,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779749539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:04:53,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577108106] [2021-08-12 19:04:53,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:04:53,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:04:53,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:04:53,442 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-12 19:04:53,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:08:38,834 WARN L205 SmtUtils]: Spent 3.74 m on a formula simplification. DAG size of input: 112621 DAG size of output: 44 [2021-08-12 19:08:39,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:08:39,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-08-12 19:08:39,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:08:39,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:08:39,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-08-12 19:08:39,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 19:08:39,098 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-08-12 19:08:39,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:08:39,100 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-08-12 19:08:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:08:39,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577108106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:08:39,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:08:39,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 19:08:39,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803585714] [2021-08-12 19:08:39,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:08:39,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:08:39,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:08:39,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:08:39,133 INFO L87 Difference]: Start difference. First operand 35 states and 73 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:08:39,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:08:39,511 INFO L93 Difference]: Finished difference Result 81 states and 148 transitions. [2021-08-12 19:08:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:08:39,511 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-12 19:08:39,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:08:39,512 INFO L225 Difference]: With dead ends: 81 [2021-08-12 19:08:39,512 INFO L226 Difference]: Without dead ends: 69 [2021-08-12 19:08:39,512 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:08:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-12 19:08:39,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2021-08-12 19:08:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:08:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 79 transitions. [2021-08-12 19:08:39,516 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 79 transitions. Word has length 13 [2021-08-12 19:08:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:08:39,516 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 79 transitions. [2021-08-12 19:08:39,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:08:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 79 transitions. [2021-08-12 19:08:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 19:08:39,517 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:08:39,517 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:08:39,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:08:39,729 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:08:39,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:08:39,729 INFO L82 PathProgramCache]: Analyzing trace with hash 674492952, now seen corresponding path program 5 times [2021-08-12 19:08:39,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:08:39,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832513216] [2021-08-12 19:08:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:08:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:08:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:08:39,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:08:39,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832513216] [2021-08-12 19:08:39,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832513216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:08:39,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691105132] [2021-08-12 19:08:39,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:08:39,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:08:39,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:08:39,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:08:39,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:08:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:08:39,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691105132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:08:39,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:08:39,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-12 19:08:39,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756548951] [2021-08-12 19:08:39,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:08:39,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:08:39,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:08:39,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:08:39,816 INFO L87 Difference]: Start difference. First operand 39 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:08:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:08:39,877 INFO L93 Difference]: Finished difference Result 73 states and 144 transitions. [2021-08-12 19:08:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:08:39,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-12 19:08:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:08:39,879 INFO L225 Difference]: With dead ends: 73 [2021-08-12 19:08:39,879 INFO L226 Difference]: Without dead ends: 64 [2021-08-12 19:08:39,879 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:08:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-12 19:08:39,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2021-08-12 19:08:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:08:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 88 transitions. [2021-08-12 19:08:39,891 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 88 transitions. Word has length 13 [2021-08-12 19:08:39,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:08:39,891 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 88 transitions. [2021-08-12 19:08:39,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:08:39,891 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 88 transitions. [2021-08-12 19:08:39,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:08:39,895 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:08:39,895 INFO L550 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:08:40,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-12 19:08:40,118 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:08:40,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:08:40,119 INFO L82 PathProgramCache]: Analyzing trace with hash 475816857, now seen corresponding path program 11 times [2021-08-12 19:08:40,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:08:40,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686498220] [2021-08-12 19:08:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:08:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:08:40,654 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 2844 DAG size of output: 41 [2021-08-12 19:08:41,542 WARN L205 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 5510 DAG size of output: 14 [2021-08-12 19:08:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:08:41,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:08:41,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686498220] [2021-08-12 19:08:41,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686498220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:08:41,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266929156] [2021-08-12 19:08:41,557 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:08:41,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:08:41,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:08:41,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:08:41,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown