/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 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 19:39:56,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 19:39:56,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 19:39:56,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 19:39:56,321 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 [2021-06-12 19:39:56,349 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 19:39:56,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 19:39:56,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 19:39:56,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 19:39:56,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 19:39:56,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 19:39:56,352 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 19:39:56,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 19:39:56,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 19:39:56,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 19:39:56,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 19:39:56,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 19:39:56,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 19:39:56,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 19:39:56,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 19:39:56,353 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 19:39:56,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 19:39:56,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 19:39:56,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 19:39:56,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 19:39:56,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 19:39:56,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 19:39:56,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 19:39:56,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:39:56,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 19:39:56,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 19:39:56,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 19:39:56,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 19:39:56,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 19:39:56,355 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 19:39:56,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 19:39:56,355 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 19:39:56,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 19:39:56,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 19:39:56,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 19:39:56,586 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 19:39:56,587 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 19:39:56,587 INFO L432 ainManager$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 [2021-06-12 19:39:56,587 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-5.wvr.bpl' [2021-06-12 19:39:56,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 19:39:56,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 19:39:56,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 19:39:56,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 19:39:56,618 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 19:39:56,626 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 12.06 07:39:56" (1/1) ... [2021-06-12 19:39:56,631 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 12.06 07:39:56" (1/1) ... [2021-06-12 19:39:56,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 19:39:56,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 19:39:56,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 19:39:56,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 19:39:56,641 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 12.06 07:39:56" (1/1) ... [2021-06-12 19:39:56,641 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 12.06 07:39:56" (1/1) ... [2021-06-12 19:39:56,642 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 12.06 07:39:56" (1/1) ... [2021-06-12 19:39:56,642 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 12.06 07:39:56" (1/1) ... [2021-06-12 19:39:56,644 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 12.06 07:39:56" (1/1) ... [2021-06-12 19:39:56,645 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 12.06 07:39:56" (1/1) ... [2021-06-12 19:39:56,646 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 12.06 07:39:56" (1/1) ... [2021-06-12 19:39:56,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 19:39:56,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 19:39:56,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 19:39:56,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 19:39:56,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:39:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:39:56,713 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 19:39:56,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 19:39:56,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 19:39:56,714 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 19:39:56,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 19:39:56,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 19:39:56,715 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 19:39:56,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 19:39:56,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 19:39:56,715 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 19:39:56,960 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 19:39:56,961 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-12 19:39:56,961 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-12 19:39:56,962 INFO L202 PluginConnector]: Adding new model unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:39:56 BoogieIcfgContainer [2021-06-12 19:39:56,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 19:39:56,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 19:39:56,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 19:39:56,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 19:39:56,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:39:56" (1/2) ... [2021-06-12 19:39:56,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6c8f3c and model type unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 07:39:56, skipping insertion in model container [2021-06-12 19:39:56,966 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 12.06 07:39:56" (2/2) ... [2021-06-12 19:39:56,967 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.bpl [2021-06-12 19:39:56,970 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 19:39:56,970 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 19:39:56,970 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 19:39:56,971 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 19:39:56,996 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 19:39:57,009 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 19:39:57,020 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 19:39:57,020 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 19:39:57,020 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 19:39:57,020 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 19:39:57,020 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 19:39:57,021 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 19:39:57,021 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 19:39:57,021 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 19:39:57,037 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-06-12 19:39:57,045 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-12 19:39:57,050 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:57,050 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:57,051 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:57,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1938062105, now seen corresponding path program 1 times [2021-06-12 19:39:57,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:57,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142087676] [2021-06-12 19:39:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:57,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:57,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142087676] [2021-06-12 19:39:57,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142087676] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:39:57,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:39:57,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:39:57,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919710809] [2021-06-12 19:39:57,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:39:57,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:57,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:39:57,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:39:57,211 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:57,239 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-06-12 19:39:57,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:39:57,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-12 19:39:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:57,245 INFO L225 Difference]: With dead ends: 26 [2021-06-12 19:39:57,245 INFO L226 Difference]: Without dead ends: 18 [2021-06-12 19:39:57,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:39:57,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-12 19:39:57,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-12 19:39:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-06-12 19:39:57,265 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-06-12 19:39:57,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:57,265 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-06-12 19:39:57,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-06-12 19:39:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-12 19:39:57,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:57,266 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:57,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 19:39:57,266 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:57,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:57,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1613321831, now seen corresponding path program 2 times [2021-06-12 19:39:57,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:57,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403178434] [2021-06-12 19:39:57,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:57,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:57,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403178434] [2021-06-12 19:39:57,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403178434] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:39:57,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:39:57,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:39:57,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398144785] [2021-06-12 19:39:57,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:39:57,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:57,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:39:57,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:39:57,324 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:57,345 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-12 19:39:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:39:57,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-12 19:39:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:57,346 INFO L225 Difference]: With dead ends: 28 [2021-06-12 19:39:57,346 INFO L226 Difference]: Without dead ends: 23 [2021-06-12 19:39:57,347 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:39:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-06-12 19:39:57,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-06-12 19:39:57,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:57,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-12 19:39:57,350 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-12 19:39:57,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:57,350 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-12 19:39:57,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:57,350 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-12 19:39:57,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:39:57,350 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:57,351 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:57,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 19:39:57,351 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:57,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:57,351 INFO L82 PathProgramCache]: Analyzing trace with hash -104131845, now seen corresponding path program 1 times [2021-06-12 19:39:57,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:57,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80176738] [2021-06-12 19:39:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:58,327 WARN L205 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 5498 DAG size of output: 50 [2021-06-12 19:39:58,459 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-06-12 19:39:59,161 WARN L205 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 5496 DAG size of output: 12 [2021-06-12 19:39:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:59,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:59,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80176738] [2021-06-12 19:39:59,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80176738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:59,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514437786] [2021-06-12 19:39:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:39:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:59,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:39:59,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:00,298 WARN L205 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 2125 DAG size of output: 13 [2021-06-12 19:40:00,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:40:00,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:00,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:00,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:40:00,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-12 19:40:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:00,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514437786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:00,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:00,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-12 19:40:00,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583430862] [2021-06-12 19:40:00,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:40:00,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:00,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:40:00,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:40:00,329 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) [2021-06-12 19:40:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:00,378 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-06-12 19:40:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:40:00,379 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 [2021-06-12 19:40:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:00,379 INFO L225 Difference]: With dead ends: 30 [2021-06-12 19:40:00,379 INFO L226 Difference]: Without dead ends: 22 [2021-06-12 19:40:00,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:40:00,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-06-12 19:40:00,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-06-12 19:40:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-12 19:40:00,382 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-12 19:40:00,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:00,382 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-12 19:40:00,382 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) [2021-06-12 19:40:00,382 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-12 19:40:00,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:40:00,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:00,383 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:00,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 19:40:00,597 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:00,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:00,597 INFO L82 PathProgramCache]: Analyzing trace with hash 639451515, now seen corresponding path program 2 times [2021-06-12 19:40:00,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:00,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060949285] [2021-06-12 19:40:00,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:01,264 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 5498 DAG size of output: 50 [2021-06-12 19:40:01,379 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-06-12 19:40:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:01,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:01,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060949285] [2021-06-12 19:40:01,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060949285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:01,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229279010] [2021-06-12 19:40:01,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:40:01,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:40:01,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:01,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:40:01,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:02,327 WARN L205 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 2127 DAG size of output: 38 [2021-06-12 19:40:02,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:40:02,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:02,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:02,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-06-12 19:40:02,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:40:02,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:02,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-12 19:40:02,405 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:40:02,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:02,424 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 [2021-06-12 19:40:02,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:40:02,523 INFO L628 ElimStorePlain]: treesize reduction 61, result has 26.5 percent of original size [2021-06-12 19:40:02,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:40:02,524 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:108, output treesize:22 [2021-06-12 19:40:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:02,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229279010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:02,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:02,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-12 19:40:02,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301936298] [2021-06-12 19:40:02,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:40:02,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:02,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:40:02,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:40:02,564 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) [2021-06-12 19:40:02,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:02,631 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-06-12 19:40:02,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:40:02,632 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 [2021-06-12 19:40:02,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:02,633 INFO L225 Difference]: With dead ends: 35 [2021-06-12 19:40:02,634 INFO L226 Difference]: Without dead ends: 30 [2021-06-12 19:40:02,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:40:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-06-12 19:40:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-06-12 19:40:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-12 19:40:02,639 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-12 19:40:02,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:02,639 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-12 19:40:02,639 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) [2021-06-12 19:40:02,640 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-12 19:40:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:40:02,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:02,640 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:02,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:40:02,860 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:02,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:02,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1490595647, now seen corresponding path program 3 times [2021-06-12 19:40:02,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:02,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696847876] [2021-06-12 19:40:02,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:02,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:02,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696847876] [2021-06-12 19:40:02,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696847876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:02,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924526864] [2021-06-12 19:40:02,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:40:02,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:40:02,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:02,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:40:02,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:33,839 WARN L205 SmtUtils]: Spent 3.50 m on a formula simplification. DAG size of input: 112621 DAG size of output: 44 [2021-06-12 19:43:33,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:33,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-06-12 19:43:33,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:43:33,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:33,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-12 19:43:33,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:43:33,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:43:33,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:33,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:33,956 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 [2021-06-12 19:43:33,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:43:34,037 INFO L628 ElimStorePlain]: treesize reduction 58, result has 27.5 percent of original size [2021-06-12 19:43:34,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:43:34,041 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:105, output treesize:22 [2021-06-12 19:43:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:34,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924526864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:34,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:34,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-12 19:43:34,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090277372] [2021-06-12 19:43:34,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:43:34,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:34,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:43:34,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:43:34,069 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) [2021-06-12 19:43:34,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:34,202 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-06-12 19:43:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:43:34,202 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 [2021-06-12 19:43:34,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:34,203 INFO L225 Difference]: With dead ends: 51 [2021-06-12 19:43:34,203 INFO L226 Difference]: Without dead ends: 41 [2021-06-12 19:43:34,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:43:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-12 19:43:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-06-12 19:43:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-12 19:43:34,205 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-06-12 19:43:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:34,206 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-12 19:43:34,206 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) [2021-06-12 19:43:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-12 19:43:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:43:34,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:34,206 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:34,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:34,407 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:34,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:34,407 INFO L82 PathProgramCache]: Analyzing trace with hash 829331864, now seen corresponding path program 1 times [2021-06-12 19:43:34,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:34,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936995218] [2021-06-12 19:43:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:34,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:34,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936995218] [2021-06-12 19:43:34,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936995218] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:43:34,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:43:34,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:43:34,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74082983] [2021-06-12 19:43:34,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:43:34,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:34,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:43:34,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:43:34,424 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:34,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:34,437 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-06-12 19:43:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:43:34,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 19:43:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:34,437 INFO L225 Difference]: With dead ends: 29 [2021-06-12 19:43:34,437 INFO L226 Difference]: Without dead ends: 29 [2021-06-12 19:43:34,438 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:43:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-06-12 19:43:34,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-06-12 19:43:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-06-12 19:43:34,443 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-06-12 19:43:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:34,443 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-06-12 19:43:34,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-06-12 19:43:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:43:34,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:34,444 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:34,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-12 19:43:34,444 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:34,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:34,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1012365145, now seen corresponding path program 4 times [2021-06-12 19:43:34,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:34,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297911929] [2021-06-12 19:43:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:34,926 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 2846 DAG size of output: 46 [2021-06-12 19:43:35,831 WARN L205 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 5518 DAG size of output: 38 [2021-06-12 19:43:36,693 WARN L205 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 5516 DAG size of output: 13 [2021-06-12 19:43:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:36,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:36,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297911929] [2021-06-12 19:43:36,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297911929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:36,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837529180] [2021-06-12 19:43:36,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:36,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:36,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:36,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:43:36,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:37,653 WARN L205 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 2125 DAG size of output: 15 [2021-06-12 19:43:37,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:37,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-12 19:43:37,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:37,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:37,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:43:37,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-12 19:43:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:37,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837529180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:37,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:37,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-12 19:43:37,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539816156] [2021-06-12 19:43:37,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:43:37,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:37,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:43:37,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:43:37,676 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) [2021-06-12 19:43:37,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:37,751 INFO L93 Difference]: Finished difference Result 37 states and 65 transitions. [2021-06-12 19:43:37,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:43:37,752 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 [2021-06-12 19:43:37,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:37,752 INFO L225 Difference]: With dead ends: 37 [2021-06-12 19:43:37,752 INFO L226 Difference]: Without dead ends: 29 [2021-06-12 19:43:37,752 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:43:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-06-12 19:43:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-06-12 19:43:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-06-12 19:43:37,754 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-06-12 19:43:37,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:37,755 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-06-12 19:43:37,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:37,755 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-06-12 19:43:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:43:37,755 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:37,755 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:37,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:37,965 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:37,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1755948505, now seen corresponding path program 5 times [2021-06-12 19:43:37,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:37,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458791070] [2021-06-12 19:43:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:38,860 WARN L205 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 2941 DAG size of output: 54 [2021-06-12 19:43:38,967 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2021-06-12 19:43:40,543 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 5612 DAG size of output: 47 [2021-06-12 19:43:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:40,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:40,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458791070] [2021-06-12 19:43:40,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458791070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:40,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112574699] [2021-06-12 19:43:40,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:40,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:40,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:40,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:43:40,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:41,538 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 2127 DAG size of output: 32 [2021-06-12 19:43:41,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:41,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-06-12 19:43:41,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:43:41,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:41,598 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 [2021-06-12 19:43:41,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:43:41,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:41,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-12 19:43:41,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:41,671 INFO L628 ElimStorePlain]: treesize reduction 28, result has 53.3 percent of original size [2021-06-12 19:43:41,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:43:41,672 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:85, output treesize:32 [2021-06-12 19:43:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:41,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112574699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:41,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:41,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-12 19:43:41,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800887477] [2021-06-12 19:43:41,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:43:41,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:41,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:43:41,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:43:41,711 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) [2021-06-12 19:43:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:41,789 INFO L93 Difference]: Finished difference Result 43 states and 85 transitions. [2021-06-12 19:43:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:43:41,789 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 [2021-06-12 19:43:41,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:41,789 INFO L225 Difference]: With dead ends: 43 [2021-06-12 19:43:41,790 INFO L226 Difference]: Without dead ends: 38 [2021-06-12 19:43:41,790 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:43:41,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-06-12 19:43:41,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-06-12 19:43:41,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-06-12 19:43:41,793 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-06-12 19:43:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:41,793 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-06-12 19:43:41,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-06-12 19:43:41,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:43:41,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:41,793 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:42,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 19:43:42,005 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:42,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1687874659, now seen corresponding path program 6 times [2021-06-12 19:43:42,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:42,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989950925] [2021-06-12 19:43:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:42,469 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 2846 DAG size of output: 46 [2021-06-12 19:43:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:42,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:42,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989950925] [2021-06-12 19:43:42,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989950925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:42,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605038052] [2021-06-12 19:43:42,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:42,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:43:42,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:42,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:43:42,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:42,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:42,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-06-12 19:43:42,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:43:42,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:42,760 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 [2021-06-12 19:43:42,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:43:42,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:42,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-12 19:43:42,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:42,848 INFO L628 ElimStorePlain]: treesize reduction 28, result has 53.3 percent of original size [2021-06-12 19:43:42,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:43:42,849 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:85, output treesize:32 [2021-06-12 19:43:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:42,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605038052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:42,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:42,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-12 19:43:42,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627432035] [2021-06-12 19:43:42,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:43:42,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:42,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:43:42,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:43:42,897 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) [2021-06-12 19:43:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:43,035 INFO L93 Difference]: Finished difference Result 61 states and 110 transitions. [2021-06-12 19:43:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:43:43,036 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 [2021-06-12 19:43:43,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:43,036 INFO L225 Difference]: With dead ends: 61 [2021-06-12 19:43:43,036 INFO L226 Difference]: Without dead ends: 51 [2021-06-12 19:43:43,037 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:43,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-12 19:43:43,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2021-06-12 19:43:43,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-06-12 19:43:43,039 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-06-12 19:43:43,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:43,039 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-06-12 19:43:43,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:43,039 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-06-12 19:43:43,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:43:43,039 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:43,040 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:43,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:43,253 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:43,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1945828854, now seen corresponding path program 1 times [2021-06-12 19:43:43,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:43,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496530277] [2021-06-12 19:43:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:43,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:43,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496530277] [2021-06-12 19:43:43,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496530277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:43,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344169124] [2021-06-12 19:43:43,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:43,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 19:43:43,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:43,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344169124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:43,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:43,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-12 19:43:43,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083766616] [2021-06-12 19:43:43,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:43:43,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:43,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:43:43,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:43:43,334 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) [2021-06-12 19:43:43,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:43,362 INFO L93 Difference]: Finished difference Result 59 states and 102 transitions. [2021-06-12 19:43:43,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:43:43,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-12 19:43:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:43,362 INFO L225 Difference]: With dead ends: 59 [2021-06-12 19:43:43,362 INFO L226 Difference]: Without dead ends: 59 [2021-06-12 19:43:43,363 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:43:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-12 19:43:43,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2021-06-12 19:43:43,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:43,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-06-12 19:43:43,365 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 12 [2021-06-12 19:43:43,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:43,365 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-06-12 19:43:43,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-06-12 19:43:43,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:43:43,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:43,366 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:43,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:43,577 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:43,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:43,577 INFO L82 PathProgramCache]: Analyzing trace with hash -115030948, now seen corresponding path program 2 times [2021-06-12 19:43:43,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:43,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119460552] [2021-06-12 19:43:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:43,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:43,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119460552] [2021-06-12 19:43:43,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119460552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:43,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114281800] [2021-06-12 19:43:43,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:43,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:43,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:43,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 19:43:43,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:43,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114281800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:43,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:43,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-12 19:43:43,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243225398] [2021-06-12 19:43:43,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:43:43,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:43,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:43:43,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:43:43,641 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:43,690 INFO L93 Difference]: Finished difference Result 43 states and 82 transitions. [2021-06-12 19:43:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:43:43,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-12 19:43:43,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:43,691 INFO L225 Difference]: With dead ends: 43 [2021-06-12 19:43:43,691 INFO L226 Difference]: Without dead ends: 43 [2021-06-12 19:43:43,691 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:43:43,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-12 19:43:43,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2021-06-12 19:43:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-06-12 19:43:43,693 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 12 [2021-06-12 19:43:43,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:43,693 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-06-12 19:43:43,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-06-12 19:43:43,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:43:43,694 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:43,694 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:43,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-12 19:43:43,901 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:43,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:43,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1264033467, now seen corresponding path program 7 times [2021-06-12 19:43:43,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:43,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070481349] [2021-06-12 19:43:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:44,410 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 2845 DAG size of output: 42 [2021-06-12 19:43:45,281 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 5510 DAG size of output: 25 [2021-06-12 19:43:46,129 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 5508 DAG size of output: 14 [2021-06-12 19:43:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:46,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:46,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070481349] [2021-06-12 19:43:46,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070481349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:46,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105323292] [2021-06-12 19:43:46,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:46,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:43:46,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:47,071 WARN L205 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 2125 DAG size of output: 16 [2021-06-12 19:43:47,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:47,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:43:47,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:47,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:47,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:43:47,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-12 19:43:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:47,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105323292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:47,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:47,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 19:43:47,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907095375] [2021-06-12 19:43:47,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:43:47,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:47,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:43:47,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:43:47,097 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) [2021-06-12 19:43:47,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:47,190 INFO L93 Difference]: Finished difference Result 42 states and 80 transitions. [2021-06-12 19:43:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:43:47,190 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 [2021-06-12 19:43:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:47,191 INFO L225 Difference]: With dead ends: 42 [2021-06-12 19:43:47,191 INFO L226 Difference]: Without dead ends: 34 [2021-06-12 19:43:47,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 196.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:43:47,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-06-12 19:43:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-06-12 19:43:47,192 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) [2021-06-12 19:43:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 69 transitions. [2021-06-12 19:43:47,193 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 69 transitions. Word has length 13 [2021-06-12 19:43:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:47,193 INFO L482 AbstractCegarLoop]: Abstraction has 34 states and 69 transitions. [2021-06-12 19:43:47,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 69 transitions. [2021-06-12 19:43:47,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:43:47,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:47,193 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:47,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:47,409 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:47,409 INFO L82 PathProgramCache]: Analyzing trace with hash 2007616827, now seen corresponding path program 8 times [2021-06-12 19:43:47,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:47,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183496792] [2021-06-12 19:43:47,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:47,923 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 2845 DAG size of output: 42 [2021-06-12 19:43:48,785 WARN L205 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 5510 DAG size of output: 25 [2021-06-12 19:43:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:48,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:48,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183496792] [2021-06-12 19:43:48,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183496792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:48,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496765009] [2021-06-12 19:43:48,830 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) [2021-06-12 19:43:48,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:48,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:48,861 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:43:48,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:49,741 WARN L205 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 2127 DAG size of output: 25 [2021-06-12 19:43:49,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:49,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:43:49,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:49,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:49,799 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 [2021-06-12 19:43:49,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:43:49,843 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:43:49,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:43:49,844 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-12 19:43:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:49,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496765009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:49,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:49,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 19:43:49,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299909425] [2021-06-12 19:43:49,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:43:49,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:49,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:43:49,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:43:49,870 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) [2021-06-12 19:43:49,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:49,976 INFO L93 Difference]: Finished difference Result 48 states and 97 transitions. [2021-06-12 19:43:49,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:43:49,976 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 [2021-06-12 19:43:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:49,977 INFO L225 Difference]: With dead ends: 48 [2021-06-12 19:43:49,977 INFO L226 Difference]: Without dead ends: 43 [2021-06-12 19:43:49,977 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:43:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-12 19:43:49,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2021-06-12 19:43:49,980 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) [2021-06-12 19:43:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 69 transitions. [2021-06-12 19:43:49,981 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 69 transitions. Word has length 13 [2021-06-12 19:43:49,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:49,981 INFO L482 AbstractCegarLoop]: Abstraction has 34 states and 69 transitions. [2021-06-12 19:43:49,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:49,981 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 69 transitions. [2021-06-12 19:43:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:43:49,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:49,981 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:50,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:50,184 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:50,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:50,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1436206337, now seen corresponding path program 9 times [2021-06-12 19:43:50,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:50,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179055900] [2021-06-12 19:43:50,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:50,669 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 2845 DAG size of output: 42 [2021-06-12 19:43:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:50,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:50,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179055900] [2021-06-12 19:43:50,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179055900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:50,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499125040] [2021-06-12 19:43:50,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:50,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:43:50,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:50,767 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:43:50,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:51,643 WARN L205 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 1384 DAG size of output: 45 [2021-06-12 19:43:51,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:51,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:43:51,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:51,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:51,729 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 [2021-06-12 19:43:51,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:43:51,761 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:43:51,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:43:51,761 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-12 19:43:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:51,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499125040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:51,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:51,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 19:43:51,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798968442] [2021-06-12 19:43:51,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:43:51,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:51,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:43:51,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:43:51,785 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) [2021-06-12 19:43:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:51,930 INFO L93 Difference]: Finished difference Result 73 states and 141 transitions. [2021-06-12 19:43:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:43:51,930 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 [2021-06-12 19:43:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:51,931 INFO L225 Difference]: With dead ends: 73 [2021-06-12 19:43:51,931 INFO L226 Difference]: Without dead ends: 63 [2021-06-12 19:43:51,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:43:51,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-12 19:43:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2021-06-12 19:43:51,933 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) [2021-06-12 19:43:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 69 transitions. [2021-06-12 19:43:51,933 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 69 transitions. Word has length 13 [2021-06-12 19:43:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:51,933 INFO L482 AbstractCegarLoop]: Abstraction has 34 states and 69 transitions. [2021-06-12 19:43:51,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 69 transitions. [2021-06-12 19:43:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:43:51,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:51,934 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:52,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-12 19:43:52,137 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:52,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:52,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2097470120, now seen corresponding path program 3 times [2021-06-12 19:43:52,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:52,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922875696] [2021-06-12 19:43:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:52,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:52,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922875696] [2021-06-12 19:43:52,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922875696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:52,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274934515] [2021-06-12 19:43:52,159 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 [2021-06-12 19:43:52,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:43:52,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:52,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:43:52,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:52,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274934515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:52,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:52,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:43:52,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220469394] [2021-06-12 19:43:52,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:43:52,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:52,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:43:52,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:43:52,221 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) [2021-06-12 19:43:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:52,257 INFO L93 Difference]: Finished difference Result 86 states and 153 transitions. [2021-06-12 19:43:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:43:52,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:43:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:52,258 INFO L225 Difference]: With dead ends: 86 [2021-06-12 19:43:52,258 INFO L226 Difference]: Without dead ends: 86 [2021-06-12 19:43:52,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:43:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-12 19:43:52,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 35. [2021-06-12 19:43:52,260 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) [2021-06-12 19:43:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 73 transitions. [2021-06-12 19:43:52,261 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 73 transitions. Word has length 13 [2021-06-12 19:43:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:52,261 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 73 transitions. [2021-06-12 19:43:52,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 73 transitions. [2021-06-12 19:43:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:43:52,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:52,261 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:52,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-12 19:43:52,465 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:52,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:52,465 INFO L82 PathProgramCache]: Analyzing trace with hash 136637374, now seen corresponding path program 4 times [2021-06-12 19:43:52,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:52,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642603299] [2021-06-12 19:43:52,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:52,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:52,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642603299] [2021-06-12 19:43:52,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642603299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:52,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595445158] [2021-06-12 19:43:52,487 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 [2021-06-12 19:43:52,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:52,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:52,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:43:52,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:52,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595445158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:52,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:52,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:43:52,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217160371] [2021-06-12 19:43:52,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:43:52,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:52,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:43:52,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:43:52,546 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) [2021-06-12 19:43:52,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:52,587 INFO L93 Difference]: Finished difference Result 64 states and 118 transitions. [2021-06-12 19:43:52,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:43:52,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:43:52,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:52,588 INFO L225 Difference]: With dead ends: 64 [2021-06-12 19:43:52,588 INFO L226 Difference]: Without dead ends: 64 [2021-06-12 19:43:52,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:43:52,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-12 19:43:52,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 35. [2021-06-12 19:43:52,590 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) [2021-06-12 19:43:52,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 73 transitions. [2021-06-12 19:43:52,590 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 73 transitions. Word has length 13 [2021-06-12 19:43:52,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:52,590 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 73 transitions. [2021-06-12 19:43:52,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:52,590 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 73 transitions. [2021-06-12 19:43:52,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:43:52,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:52,590 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:52,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 19:43:52,793 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:52,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:52,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1085182591, now seen corresponding path program 10 times [2021-06-12 19:43:52,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:52,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140950898] [2021-06-12 19:43:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:52,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:52,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140950898] [2021-06-12 19:43:52,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140950898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:52,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729414997] [2021-06-12 19:43:52,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:52,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:52,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:52,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:43:52,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:47:23,647 WARN L205 SmtUtils]: Spent 3.50 m on a formula simplification. DAG size of input: 112621 DAG size of output: 44 [2021-06-12 19:47:23,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:47:23,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:47:23,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:47:23,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:47:23,826 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 [2021-06-12 19:47:23,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:47:23,865 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:47:23,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:47:23,866 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-12 19:47:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:47:23,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729414997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:47:23,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:47:23,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 19:47:23,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950128371] [2021-06-12 19:47:23,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:47:23,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:47:23,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:47:23,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:47:23,894 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) [2021-06-12 19:47:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:47:24,220 INFO L93 Difference]: Finished difference Result 79 states and 145 transitions. [2021-06-12 19:47:24,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:47:24,220 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 [2021-06-12 19:47:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:47:24,220 INFO L225 Difference]: With dead ends: 79 [2021-06-12 19:47:24,220 INFO L226 Difference]: Without dead ends: 69 [2021-06-12 19:47:24,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:47:24,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-12 19:47:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2021-06-12 19:47:24,222 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) [2021-06-12 19:47:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 79 transitions. [2021-06-12 19:47:24,223 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 79 transitions. Word has length 13 [2021-06-12 19:47:24,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:47:24,223 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 79 transitions. [2021-06-12 19:47:24,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:47:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 79 transitions. [2021-06-12 19:47:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:47:24,223 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:47:24,223 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:47:24,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:47:24,439 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:47:24,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:47:24,440 INFO L82 PathProgramCache]: Analyzing trace with hash 674492952, now seen corresponding path program 5 times [2021-06-12 19:47:24,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:47:24,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487532539] [2021-06-12 19:47:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:47:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:47:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:47:24,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:47:24,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487532539] [2021-06-12 19:47:24,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487532539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:47:24,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481703754] [2021-06-12 19:47:24,459 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 [2021-06-12 19:47:24,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:47:24,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:47:24,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:47:24,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:47:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:47:24,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481703754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:47:24,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:47:24,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:47:24,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841865712] [2021-06-12 19:47:24,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:47:24,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:47:24,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:47:24,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:47:24,515 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) [2021-06-12 19:47:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:47:24,560 INFO L93 Difference]: Finished difference Result 64 states and 127 transitions. [2021-06-12 19:47:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:47:24,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:47:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:47:24,561 INFO L225 Difference]: With dead ends: 64 [2021-06-12 19:47:24,561 INFO L226 Difference]: Without dead ends: 64 [2021-06-12 19:47:24,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:47:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-12 19:47:24,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2021-06-12 19:47:24,569 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) [2021-06-12 19:47:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 88 transitions. [2021-06-12 19:47:24,570 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 88 transitions. Word has length 13 [2021-06-12 19:47:24,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:47:24,570 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 88 transitions. [2021-06-12 19:47:24,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:47:24,570 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 88 transitions. [2021-06-12 19:47:24,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:47:24,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:47:24,573 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:47:24,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-12 19:47:24,777 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:47:24,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:47:24,777 INFO L82 PathProgramCache]: Analyzing trace with hash 475816857, now seen corresponding path program 11 times [2021-06-12 19:47:24,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:47:24,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512315281] [2021-06-12 19:47:24,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:47:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:47:25,272 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 2844 DAG size of output: 41 [2021-06-12 19:47:26,101 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 5510 DAG size of output: 14 [2021-06-12 19:47:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:47:26,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:47:26,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512315281] [2021-06-12 19:47:26,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512315281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:47:26,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266555674] [2021-06-12 19:47:26,123 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 [2021-06-12 19:47:26,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:47:26,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:47:26,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:47:26,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:09,716 WARN L205 SmtUtils]: Spent 1.72 m on a formula simplification. DAG size of input: 7792 DAG size of output: 48 [2021-06-12 19:49:09,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:49:09,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:49:09,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:49:09,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:49:09,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:49:09,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-12 19:49:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:09,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266555674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:09,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:09,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 19:49:09,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237520327] [2021-06-12 19:49:09,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:49:09,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:09,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:49:09,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:49:09,805 INFO L87 Difference]: Start difference. First operand 42 states and 88 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:09,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:09,906 INFO L93 Difference]: Finished difference Result 54 states and 111 transitions. [2021-06-12 19:49:09,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:49:09,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:49:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:09,907 INFO L225 Difference]: With dead ends: 54 [2021-06-12 19:49:09,907 INFO L226 Difference]: Without dead ends: 49 [2021-06-12 19:49:09,907 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:49:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-12 19:49:09,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-06-12 19:49:09,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:09,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-06-12 19:49:09,909 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-06-12 19:49:09,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:09,909 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-06-12 19:49:09,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:09,910 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-06-12 19:49:09,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:49:09,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:09,910 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:10,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 19:49:10,110 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:49:10,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:10,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2070544349, now seen corresponding path program 12 times [2021-06-12 19:49:10,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:10,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47879694] [2021-06-12 19:49:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:10,595 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 2844 DAG size of output: 41 [2021-06-12 19:49:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:10,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:10,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47879694] [2021-06-12 19:49:10,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47879694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:10,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672803896] [2021-06-12 19:49:10,650 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:10,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:49:10,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:10,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:49:10,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:10,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:49:10,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:49:10,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:49:10,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:49:10,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:49:10,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-12 19:49:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:10,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672803896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:10,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:10,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 19:49:10,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72622808] [2021-06-12 19:49:10,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:49:10,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:10,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:49:10,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:49:10,835 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:10,927 INFO L93 Difference]: Finished difference Result 65 states and 124 transitions. [2021-06-12 19:49:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:49:10,927 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:49:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:10,928 INFO L225 Difference]: With dead ends: 65 [2021-06-12 19:49:10,928 INFO L226 Difference]: Without dead ends: 60 [2021-06-12 19:49:10,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:49:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-12 19:49:10,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2021-06-12 19:49:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-06-12 19:49:10,929 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-06-12 19:49:10,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:10,930 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-06-12 19:49:10,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-06-12 19:49:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:49:10,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:10,930 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:11,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:11,137 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:49:11,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:11,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1409280566, now seen corresponding path program 6 times [2021-06-12 19:49:11,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:11,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945267902] [2021-06-12 19:49:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:11,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:11,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945267902] [2021-06-12 19:49:11,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945267902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:11,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620961785] [2021-06-12 19:49:11,168 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:11,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:49:11,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:11,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:49:11,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:11,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620961785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:11,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:11,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-12 19:49:11,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532506078] [2021-06-12 19:49:11,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:49:11,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:11,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:49:11,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:49:11,220 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:11,264 INFO L93 Difference]: Finished difference Result 113 states and 207 transitions. [2021-06-12 19:49:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:49:11,264 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:49:11,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:11,265 INFO L225 Difference]: With dead ends: 113 [2021-06-12 19:49:11,265 INFO L226 Difference]: Without dead ends: 113 [2021-06-12 19:49:11,265 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:49:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-12 19:49:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 48. [2021-06-12 19:49:11,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 103 transitions. [2021-06-12 19:49:11,267 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 103 transitions. Word has length 14 [2021-06-12 19:49:11,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:11,267 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 103 transitions. [2021-06-12 19:49:11,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 103 transitions. [2021-06-12 19:49:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:49:11,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:11,267 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:11,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-12 19:49:11,477 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:49:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:11,477 INFO L82 PathProgramCache]: Analyzing trace with hash -651579236, now seen corresponding path program 7 times [2021-06-12 19:49:11,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:11,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299343591] [2021-06-12 19:49:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:11,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:11,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299343591] [2021-06-12 19:49:11,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299343591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:11,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232276858] [2021-06-12 19:49:11,501 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:11,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:49:11,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:11,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232276858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:11,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:11,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-12 19:49:11,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361552887] [2021-06-12 19:49:11,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:49:11,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:11,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:49:11,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:49:11,560 INFO L87 Difference]: Start difference. First operand 48 states and 103 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:11,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:11,615 INFO L93 Difference]: Finished difference Result 106 states and 193 transitions. [2021-06-12 19:49:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:49:11,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:49:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:11,616 INFO L225 Difference]: With dead ends: 106 [2021-06-12 19:49:11,616 INFO L226 Difference]: Without dead ends: 106 [2021-06-12 19:49:11,616 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:49:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-12 19:49:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 49. [2021-06-12 19:49:11,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 48 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 107 transitions. [2021-06-12 19:49:11,617 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 107 transitions. Word has length 14 [2021-06-12 19:49:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:11,618 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 107 transitions. [2021-06-12 19:49:11,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 107 transitions. [2021-06-12 19:49:11,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:49:11,618 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:11,618 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:11,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:11,825 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:49:11,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:11,825 INFO L82 PathProgramCache]: Analyzing trace with hash 296965981, now seen corresponding path program 13 times [2021-06-12 19:49:11,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:11,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469179399] [2021-06-12 19:49:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:11,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:11,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469179399] [2021-06-12 19:49:11,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469179399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:11,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306504950] [2021-06-12 19:49:11,879 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:11,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:49:11,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown