/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/popl20-more/multiply-verify.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 22:12:36,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 22:12:36,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 22:12:36,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 22:12:36,299 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 22:12:36,333 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 22:12:36,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 22:12:36,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 22:12:36,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 22:12:36,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 22:12:36,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 22:12:36,335 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 22:12:36,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 22:12:36,335 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 22:12:36,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 22:12:36,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 22:12:36,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 22:12:36,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 22:12:36,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 22:12:36,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 22:12:36,336 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 22:12:36,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 22:12:36,336 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 22:12:36,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 22:12:36,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 22:12:36,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 22:12:36,337 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 22:12:36,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 22:12:36,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:12:36,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 22:12:36,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 22:12:36,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 22:12:36,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 22:12:36,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 22:12:36,338 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 22:12:36,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 22:12:36,338 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 22:12:36,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 22:12:36,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 22:12:36,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 22:12:36,604 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 22:12:36,606 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 22:12:36,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl [2021-06-12 22:12:36,607 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl' [2021-06-12 22:12:36,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 22:12:36,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 22:12:36,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 22:12:36,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 22:12:36,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 22:12:36,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:12:36" (1/1) ... [2021-06-12 22:12:36,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:12:36" (1/1) ... [2021-06-12 22:12:36,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 22:12:36,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 22:12:36,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 22:12:36,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 22:12:36,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:12:36" (1/1) ... [2021-06-12 22:12:36,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:12:36" (1/1) ... [2021-06-12 22:12:36,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:12:36" (1/1) ... [2021-06-12 22:12:36,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:12:36" (1/1) ... [2021-06-12 22:12:36,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:12:36" (1/1) ... [2021-06-12 22:12:36,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:12:36" (1/1) ... [2021-06-12 22:12:36,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:12:36" (1/1) ... [2021-06-12 22:12:36,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 22:12:36,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 22:12:36,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 22:12:36,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 22:12:36,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:12:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:12:36,726 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 22:12:36,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 22:12:36,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 22:12:36,727 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 22:12:36,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 22:12:36,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 22:12:36,727 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 22:12:36,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 22:12:36,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 22:12:36,728 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 22:12:36,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 22:12:36,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 22:12:36,729 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 22:12:36,894 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 22:12:36,894 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 22:12:36,896 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:12:36 BoogieIcfgContainer [2021-06-12 22:12:36,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 22:12:36,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 22:12:36,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 22:12:36,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 22:12:36,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:12:36" (1/2) ... [2021-06-12 22:12:36,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181468f5 and model type multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 10:12:36, skipping insertion in model container [2021-06-12 22:12:36,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:12:36" (2/2) ... [2021-06-12 22:12:36,915 INFO L111 eAbstractionObserver]: Analyzing ICFG multiply-verify.wvr.bpl [2021-06-12 22:12:36,920 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 22:12:36,920 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 22:12:36,920 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 22:12:36,921 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 22:12:36,952 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 22:12:36,969 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 22:12:36,984 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 22:12:36,984 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 22:12:36,985 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 22:12:36,985 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 22:12:36,985 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 22:12:36,985 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 22:12:36,985 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 22:12:36,985 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 22:12:36,993 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 90 flow [2021-06-12 22:12:37,072 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 0 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 22:12:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 0 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 22:12:37,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:12:37,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:37,108 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:37,108 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:37,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:37,113 INFO L82 PathProgramCache]: Analyzing trace with hash -894934944, now seen corresponding path program 1 times [2021-06-12 22:12:37,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:37,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972482913] [2021-06-12 22:12:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:37,470 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 22:12:37,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:37,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972482913] [2021-06-12 22:12:37,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972482913] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:12:37,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:12:37,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 22:12:37,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344682792] [2021-06-12 22:12:37,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:12:37,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:37,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:12:37,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:12:37,490 INFO L87 Difference]: Start difference. First operand has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 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 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22:12:37,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:37,596 INFO L93 Difference]: Finished difference Result 349 states and 846 transitions. [2021-06-12 22:12:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:12:37,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22 [2021-06-12 22:12:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:37,611 INFO L225 Difference]: With dead ends: 349 [2021-06-12 22:12:37,611 INFO L226 Difference]: Without dead ends: 311 [2021-06-12 22:12:37,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:37,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-12 22:12:37,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 293. [2021-06-12 22:12:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.482876712328767) internal successors, (725), 292 states have internal predecessors, (725), 0 states have call successors, (0), 0 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 22:12:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 725 transitions. [2021-06-12 22:12:37,680 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 725 transitions. Word has length 22 [2021-06-12 22:12:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:37,680 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 725 transitions. [2021-06-12 22:12:37,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22:12:37,681 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 725 transitions. [2021-06-12 22:12:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:12:37,686 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:37,686 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:37,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 22:12:37,686 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:37,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1198566966, now seen corresponding path program 2 times [2021-06-12 22:12:37,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:37,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392453805] [2021-06-12 22:12:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:37,822 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 22:12:37,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:37,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392453805] [2021-06-12 22:12:37,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392453805] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:12:37,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:12:37,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 22:12:37,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285604449] [2021-06-12 22:12:37,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:12:37,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:37,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:12:37,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:12:37,826 INFO L87 Difference]: Start difference. First operand 293 states and 725 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22:12:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:37,900 INFO L93 Difference]: Finished difference Result 333 states and 800 transitions. [2021-06-12 22:12:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:12:37,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22 [2021-06-12 22:12:37,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:37,903 INFO L225 Difference]: With dead ends: 333 [2021-06-12 22:12:37,903 INFO L226 Difference]: Without dead ends: 296 [2021-06-12 22:12:37,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:37,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-12 22:12:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 220. [2021-06-12 22:12:37,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.3926940639269407) internal successors, (524), 219 states have internal predecessors, (524), 0 states have call successors, (0), 0 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 22:12:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 524 transitions. [2021-06-12 22:12:37,919 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 524 transitions. Word has length 22 [2021-06-12 22:12:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:37,920 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 524 transitions. [2021-06-12 22:12:37,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22:12:37,920 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 524 transitions. [2021-06-12 22:12:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:12:37,921 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:37,921 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:37,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 22:12:37,922 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:37,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:37,922 INFO L82 PathProgramCache]: Analyzing trace with hash -602461050, now seen corresponding path program 3 times [2021-06-12 22:12:37,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:37,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542960758] [2021-06-12 22:12:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:38,039 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 22:12:38,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:38,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542960758] [2021-06-12 22:12:38,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542960758] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:12:38,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:12:38,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 22:12:38,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821559175] [2021-06-12 22:12:38,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:12:38,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:38,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:12:38,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:12:38,042 INFO L87 Difference]: Start difference. First operand 220 states and 524 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22:12:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:38,122 INFO L93 Difference]: Finished difference Result 320 states and 768 transitions. [2021-06-12 22:12:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:12:38,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22 [2021-06-12 22:12:38,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:38,126 INFO L225 Difference]: With dead ends: 320 [2021-06-12 22:12:38,129 INFO L226 Difference]: Without dead ends: 280 [2021-06-12 22:12:38,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:38,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-12 22:12:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 218. [2021-06-12 22:12:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.3824884792626726) internal successors, (517), 217 states have internal predecessors, (517), 0 states have call successors, (0), 0 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 22:12:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 517 transitions. [2021-06-12 22:12:38,176 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 517 transitions. Word has length 22 [2021-06-12 22:12:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:38,178 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 517 transitions. [2021-06-12 22:12:38,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22:12:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 517 transitions. [2021-06-12 22:12:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:12:38,180 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:38,180 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:38,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 22:12:38,180 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:38,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:38,181 INFO L82 PathProgramCache]: Analyzing trace with hash -630863238, now seen corresponding path program 4 times [2021-06-12 22:12:38,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:38,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519569217] [2021-06-12 22:12:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:38,271 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 22:12:38,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:38,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519569217] [2021-06-12 22:12:38,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519569217] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:12:38,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:12:38,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 22:12:38,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687224446] [2021-06-12 22:12:38,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:12:38,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:38,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:12:38,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:12:38,273 INFO L87 Difference]: Start difference. First operand 218 states and 517 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22:12:38,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:38,347 INFO L93 Difference]: Finished difference Result 327 states and 775 transitions. [2021-06-12 22:12:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:12:38,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22 [2021-06-12 22:12:38,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:38,349 INFO L225 Difference]: With dead ends: 327 [2021-06-12 22:12:38,349 INFO L226 Difference]: Without dead ends: 290 [2021-06-12 22:12:38,350 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:38,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-12 22:12:38,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 226. [2021-06-12 22:12:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.3866666666666667) internal successors, (537), 225 states have internal predecessors, (537), 0 states have call successors, (0), 0 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 22:12:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 537 transitions. [2021-06-12 22:12:38,370 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 537 transitions. Word has length 22 [2021-06-12 22:12:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:38,371 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 537 transitions. [2021-06-12 22:12:38,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22:12:38,371 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 537 transitions. [2021-06-12 22:12:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:12:38,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:38,372 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:38,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 22:12:38,372 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:38,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2144128130, now seen corresponding path program 5 times [2021-06-12 22:12:38,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:38,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645485861] [2021-06-12 22:12:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:38,519 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 22:12:38,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:38,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645485861] [2021-06-12 22:12:38,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645485861] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:12:38,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:12:38,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 22:12:38,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800389859] [2021-06-12 22:12:38,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:12:38,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:38,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:12:38,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:12:38,524 INFO L87 Difference]: Start difference. First operand 226 states and 537 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22:12:38,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:38,600 INFO L93 Difference]: Finished difference Result 333 states and 810 transitions. [2021-06-12 22:12:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:12:38,601 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22 [2021-06-12 22:12:38,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:38,603 INFO L225 Difference]: With dead ends: 333 [2021-06-12 22:12:38,603 INFO L226 Difference]: Without dead ends: 296 [2021-06-12 22:12:38,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-12 22:12:38,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 242. [2021-06-12 22:12:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.4356846473029043) internal successors, (587), 241 states have internal predecessors, (587), 0 states have call successors, (0), 0 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 22:12:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 587 transitions. [2021-06-12 22:12:38,610 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 587 transitions. Word has length 22 [2021-06-12 22:12:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:38,611 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 587 transitions. [2021-06-12 22:12:38,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22:12:38,611 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 587 transitions. [2021-06-12 22:12:38,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:12:38,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:38,612 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:38,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 22:12:38,612 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:38,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:38,613 INFO L82 PathProgramCache]: Analyzing trace with hash 909995578, now seen corresponding path program 6 times [2021-06-12 22:12:38,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:38,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934304812] [2021-06-12 22:12:38,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:38,758 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 22:12:38,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:38,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934304812] [2021-06-12 22:12:38,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934304812] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:12:38,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:12:38,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 22:12:38,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004706363] [2021-06-12 22:12:38,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:12:38,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:38,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:12:38,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:12:38,763 INFO L87 Difference]: Start difference. First operand 242 states and 587 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22:12:38,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:38,848 INFO L93 Difference]: Finished difference Result 337 states and 817 transitions. [2021-06-12 22:12:38,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:12:38,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22 [2021-06-12 22:12:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:38,850 INFO L225 Difference]: With dead ends: 337 [2021-06-12 22:12:38,850 INFO L226 Difference]: Without dead ends: 297 [2021-06-12 22:12:38,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:38,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-12 22:12:38,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 224. [2021-06-12 22:12:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.3856502242152464) internal successors, (532), 223 states have internal predecessors, (532), 0 states have call successors, (0), 0 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 22:12:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 532 transitions. [2021-06-12 22:12:38,866 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 532 transitions. Word has length 22 [2021-06-12 22:12:38,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:38,866 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 532 transitions. [2021-06-12 22:12:38,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22:12:38,867 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 532 transitions. [2021-06-12 22:12:38,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:12:38,867 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:38,867 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:38,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 22:12:38,868 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:38,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:38,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2086549228, now seen corresponding path program 1 times [2021-06-12 22:12:38,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:38,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632423667] [2021-06-12 22:12:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:38,903 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 22:12:38,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:38,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632423667] [2021-06-12 22:12:38,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632423667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:38,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188205242] [2021-06-12 22:12:38,904 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 22:12:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:38,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 22:12:38,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:39,056 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 22:12:39,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188205242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:39,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:39,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 22:12:39,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294932707] [2021-06-12 22:12:39,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:12:39,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:39,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:12:39,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:12:39,058 INFO L87 Difference]: Start difference. First operand 224 states and 532 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 22:12:39,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:39,137 INFO L93 Difference]: Finished difference Result 342 states and 809 transitions. [2021-06-12 22:12:39,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:12:39,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 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 25 [2021-06-12 22:12:39,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:39,139 INFO L225 Difference]: With dead ends: 342 [2021-06-12 22:12:39,139 INFO L226 Difference]: Without dead ends: 342 [2021-06-12 22:12:39,139 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:39,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-12 22:12:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 213. [2021-06-12 22:12:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.4245283018867925) internal successors, (514), 212 states have internal predecessors, (514), 0 states have call successors, (0), 0 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 22:12:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 514 transitions. [2021-06-12 22:12:39,146 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 514 transitions. Word has length 25 [2021-06-12 22:12:39,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:39,146 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 514 transitions. [2021-06-12 22:12:39,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 22:12:39,146 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 514 transitions. [2021-06-12 22:12:39,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:12:39,147 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:39,147 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:39,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-12 22:12:39,370 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:39,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:39,371 INFO L82 PathProgramCache]: Analyzing trace with hash 785545354, now seen corresponding path program 1 times [2021-06-12 22:12:39,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:39,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240051693] [2021-06-12 22:12:39,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:39,410 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 22:12:39,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:39,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240051693] [2021-06-12 22:12:39,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240051693] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:12:39,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:12:39,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:12:39,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941637099] [2021-06-12 22:12:39,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:12:39,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:39,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:12:39,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:12:39,412 INFO L87 Difference]: Start difference. First operand 213 states and 514 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:39,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:39,468 INFO L93 Difference]: Finished difference Result 361 states and 847 transitions. [2021-06-12 22:12:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:12:39,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-12 22:12:39,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:39,470 INFO L225 Difference]: With dead ends: 361 [2021-06-12 22:12:39,470 INFO L226 Difference]: Without dead ends: 337 [2021-06-12 22:12:39,470 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:12:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-12 22:12:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 213. [2021-06-12 22:12:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.400943396226415) internal successors, (509), 212 states have internal predecessors, (509), 0 states have call successors, (0), 0 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 22:12:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 509 transitions. [2021-06-12 22:12:39,480 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 509 transitions. Word has length 25 [2021-06-12 22:12:39,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:39,481 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 509 transitions. [2021-06-12 22:12:39,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 509 transitions. [2021-06-12 22:12:39,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:12:39,483 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:39,483 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:39,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 22:12:39,483 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:39,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:39,484 INFO L82 PathProgramCache]: Analyzing trace with hash 727801610, now seen corresponding path program 2 times [2021-06-12 22:12:39,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:39,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103814794] [2021-06-12 22:12:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:39,537 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 22:12:39,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:39,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103814794] [2021-06-12 22:12:39,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103814794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:39,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321951007] [2021-06-12 22:12:39,538 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 22:12:39,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:39,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:39,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 22:12:39,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:39,696 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 22:12:39,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321951007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:39,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:39,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 22:12:39,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290500479] [2021-06-12 22:12:39,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 22:12:39,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:39,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 22:12:39,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:12:39,701 INFO L87 Difference]: Start difference. First operand 213 states and 509 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 22:12:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:39,798 INFO L93 Difference]: Finished difference Result 495 states and 1157 transitions. [2021-06-12 22:12:39,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:12:39,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 25 [2021-06-12 22:12:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:39,805 INFO L225 Difference]: With dead ends: 495 [2021-06-12 22:12:39,805 INFO L226 Difference]: Without dead ends: 495 [2021-06-12 22:12:39,805 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:12:39,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-12 22:12:39,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 221. [2021-06-12 22:12:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4318181818181817) internal successors, (535), 220 states have internal predecessors, (535), 0 states have call successors, (0), 0 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 22:12:39,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 535 transitions. [2021-06-12 22:12:39,817 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 535 transitions. Word has length 25 [2021-06-12 22:12:39,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:39,820 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 535 transitions. [2021-06-12 22:12:39,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 22:12:39,820 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 535 transitions. [2021-06-12 22:12:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:12:39,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:39,821 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:40,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:40,037 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:40,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:40,037 INFO L82 PathProgramCache]: Analyzing trace with hash 517104564, now seen corresponding path program 2 times [2021-06-12 22:12:40,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:40,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777319580] [2021-06-12 22:12:40,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:40,059 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 22:12:40,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:40,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777319580] [2021-06-12 22:12:40,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777319580] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:12:40,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:12:40,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:12:40,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877568194] [2021-06-12 22:12:40,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:12:40,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:40,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:12:40,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:12:40,061 INFO L87 Difference]: Start difference. First operand 221 states and 535 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:40,131 INFO L93 Difference]: Finished difference Result 341 states and 802 transitions. [2021-06-12 22:12:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:12:40,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-12 22:12:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:40,135 INFO L225 Difference]: With dead ends: 341 [2021-06-12 22:12:40,135 INFO L226 Difference]: Without dead ends: 335 [2021-06-12 22:12:40,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:12:40,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-12 22:12:40,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 245. [2021-06-12 22:12:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.4385245901639343) internal successors, (595), 244 states have internal predecessors, (595), 0 states have call successors, (0), 0 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 22:12:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 595 transitions. [2021-06-12 22:12:40,143 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 595 transitions. Word has length 25 [2021-06-12 22:12:40,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:40,143 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 595 transitions. [2021-06-12 22:12:40,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:40,143 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 595 transitions. [2021-06-12 22:12:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:12:40,145 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:40,145 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:40,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 22:12:40,146 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:40,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1245856382, now seen corresponding path program 3 times [2021-06-12 22:12:40,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:40,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297585695] [2021-06-12 22:12:40,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:40,188 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 22:12:40,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:40,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297585695] [2021-06-12 22:12:40,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297585695] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:12:40,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:12:40,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:12:40,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669178748] [2021-06-12 22:12:40,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:12:40,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:40,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:12:40,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:12:40,189 INFO L87 Difference]: Start difference. First operand 245 states and 595 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:40,256 INFO L93 Difference]: Finished difference Result 284 states and 686 transitions. [2021-06-12 22:12:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:12:40,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-12 22:12:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:40,258 INFO L225 Difference]: With dead ends: 284 [2021-06-12 22:12:40,258 INFO L226 Difference]: Without dead ends: 284 [2021-06-12 22:12:40,259 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:12:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-12 22:12:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 221. [2021-06-12 22:12:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.422727272727273) internal successors, (533), 220 states have internal predecessors, (533), 0 states have call successors, (0), 0 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 22:12:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 533 transitions. [2021-06-12 22:12:40,265 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 533 transitions. Word has length 25 [2021-06-12 22:12:40,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:40,265 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 533 transitions. [2021-06-12 22:12:40,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 533 transitions. [2021-06-12 22:12:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:12:40,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:40,267 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:40,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-12 22:12:40,267 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:40,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:40,267 INFO L82 PathProgramCache]: Analyzing trace with hash 868885228, now seen corresponding path program 3 times [2021-06-12 22:12:40,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:40,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789118572] [2021-06-12 22:12:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:40,298 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 22:12:40,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:40,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789118572] [2021-06-12 22:12:40,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789118572] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:12:40,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:12:40,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:12:40,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188260396] [2021-06-12 22:12:40,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:12:40,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:40,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:12:40,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:12:40,300 INFO L87 Difference]: Start difference. First operand 221 states and 533 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:40,377 INFO L93 Difference]: Finished difference Result 394 states and 930 transitions. [2021-06-12 22:12:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:12:40,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-12 22:12:40,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:40,379 INFO L225 Difference]: With dead ends: 394 [2021-06-12 22:12:40,379 INFO L226 Difference]: Without dead ends: 387 [2021-06-12 22:12:40,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:12:40,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-12 22:12:40,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 221. [2021-06-12 22:12:40,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4136363636363636) internal successors, (531), 220 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 22:12:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 531 transitions. [2021-06-12 22:12:40,385 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 531 transitions. Word has length 25 [2021-06-12 22:12:40,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:40,385 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 531 transitions. [2021-06-12 22:12:40,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:40,386 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 531 transitions. [2021-06-12 22:12:40,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:12:40,386 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:40,386 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:40,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-12 22:12:40,387 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:40,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:40,387 INFO L82 PathProgramCache]: Analyzing trace with hash -241548014, now seen corresponding path program 4 times [2021-06-12 22:12:40,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:40,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196312233] [2021-06-12 22:12:40,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:40,406 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 22:12:40,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:40,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196312233] [2021-06-12 22:12:40,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196312233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:40,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783254597] [2021-06-12 22:12:40,406 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 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 22:12:40,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:40,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:40,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 22:12:40,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:40,506 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 22:12:40,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783254597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:40,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:40,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 22:12:40,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567771251] [2021-06-12 22:12:40,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:12:40,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:40,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:12:40,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:12:40,509 INFO L87 Difference]: Start difference. First operand 221 states and 531 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 22:12:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:40,580 INFO L93 Difference]: Finished difference Result 340 states and 811 transitions. [2021-06-12 22:12:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:12:40,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 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 25 [2021-06-12 22:12:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:40,586 INFO L225 Difference]: With dead ends: 340 [2021-06-12 22:12:40,586 INFO L226 Difference]: Without dead ends: 340 [2021-06-12 22:12:40,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:40,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-12 22:12:40,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 209. [2021-06-12 22:12:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4278846153846154) internal successors, (505), 208 states have internal predecessors, (505), 0 states have call successors, (0), 0 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 22:12:40,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 505 transitions. [2021-06-12 22:12:40,596 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 505 transitions. Word has length 25 [2021-06-12 22:12:40,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:40,596 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 505 transitions. [2021-06-12 22:12:40,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 22:12:40,596 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 505 transitions. [2021-06-12 22:12:40,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:12:40,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:40,598 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:40,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-12 22:12:40,821 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:40,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:40,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1742404094, now seen corresponding path program 4 times [2021-06-12 22:12:40,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:40,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088586297] [2021-06-12 22:12:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:40,844 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 22:12:40,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:40,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088586297] [2021-06-12 22:12:40,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088586297] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:12:40,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:12:40,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:12:40,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047150107] [2021-06-12 22:12:40,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:12:40,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:40,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:12:40,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:12:40,847 INFO L87 Difference]: Start difference. First operand 209 states and 505 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:40,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:40,893 INFO L93 Difference]: Finished difference Result 348 states and 822 transitions. [2021-06-12 22:12:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:12:40,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-12 22:12:40,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:40,895 INFO L225 Difference]: With dead ends: 348 [2021-06-12 22:12:40,895 INFO L226 Difference]: Without dead ends: 330 [2021-06-12 22:12:40,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:12:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-12 22:12:40,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 209. [2021-06-12 22:12:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 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 22:12:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-06-12 22:12:40,901 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-06-12 22:12:40,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:40,902 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-06-12 22:12:40,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-06-12 22:12:40,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:12:40,902 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:40,903 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:40,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-12 22:12:40,903 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:40,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:40,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2089386992, now seen corresponding path program 5 times [2021-06-12 22:12:40,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:40,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100126939] [2021-06-12 22:12:40,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:40,923 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 22:12:40,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:40,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100126939] [2021-06-12 22:12:40,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100126939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:40,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254932794] [2021-06-12 22:12:40,923 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 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 22:12:40,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:40,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:40,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 22:12:40,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:41,023 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 22:12:41,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254932794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:41,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:41,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 22:12:41,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087890394] [2021-06-12 22:12:41,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 22:12:41,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:41,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 22:12:41,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:12:41,025 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 22:12:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:41,107 INFO L93 Difference]: Finished difference Result 379 states and 891 transitions. [2021-06-12 22:12:41,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:12:41,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 25 [2021-06-12 22:12:41,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:41,109 INFO L225 Difference]: With dead ends: 379 [2021-06-12 22:12:41,109 INFO L226 Difference]: Without dead ends: 379 [2021-06-12 22:12:41,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:41,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-12 22:12:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 209. [2021-06-12 22:12:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 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 22:12:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-06-12 22:12:41,117 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-06-12 22:12:41,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:41,117 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-06-12 22:12:41,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 22:12:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-06-12 22:12:41,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:12:41,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:41,118 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:41,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:41,342 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:41,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1878689946, now seen corresponding path program 5 times [2021-06-12 22:12:41,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:41,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663810641] [2021-06-12 22:12:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:41,365 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 22:12:41,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:41,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663810641] [2021-06-12 22:12:41,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663810641] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:12:41,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:12:41,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:12:41,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568937416] [2021-06-12 22:12:41,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:12:41,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:41,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:12:41,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:12:41,366 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:41,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:41,438 INFO L93 Difference]: Finished difference Result 381 states and 892 transitions. [2021-06-12 22:12:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:12:41,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-12 22:12:41,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:41,441 INFO L225 Difference]: With dead ends: 381 [2021-06-12 22:12:41,441 INFO L226 Difference]: Without dead ends: 375 [2021-06-12 22:12:41,441 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:12:41,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-12 22:12:41,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 233. [2021-06-12 22:12:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.418103448275862) internal successors, (561), 232 states have internal predecessors, (561), 0 states have call successors, (0), 0 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 22:12:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 561 transitions. [2021-06-12 22:12:41,448 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 561 transitions. Word has length 25 [2021-06-12 22:12:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:41,448 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 561 transitions. [2021-06-12 22:12:41,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 561 transitions. [2021-06-12 22:12:41,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:12:41,449 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:41,449 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:41,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-12 22:12:41,449 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:41,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:41,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1687525532, now seen corresponding path program 6 times [2021-06-12 22:12:41,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:41,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973654574] [2021-06-12 22:12:41,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:41,474 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 22:12:41,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:41,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973654574] [2021-06-12 22:12:41,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973654574] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:12:41,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:12:41,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:12:41,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176679417] [2021-06-12 22:12:41,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:12:41,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:41,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:12:41,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:12:41,476 INFO L87 Difference]: Start difference. First operand 233 states and 561 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:41,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:41,544 INFO L93 Difference]: Finished difference Result 311 states and 744 transitions. [2021-06-12 22:12:41,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:12:41,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-12 22:12:41,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:41,546 INFO L225 Difference]: With dead ends: 311 [2021-06-12 22:12:41,546 INFO L226 Difference]: Without dead ends: 311 [2021-06-12 22:12:41,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:12:41,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-12 22:12:41,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 209. [2021-06-12 22:12:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.3990384615384617) internal successors, (499), 208 states have internal predecessors, (499), 0 states have call successors, (0), 0 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 22:12:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 499 transitions. [2021-06-12 22:12:41,552 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 499 transitions. Word has length 25 [2021-06-12 22:12:41,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:41,552 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 499 transitions. [2021-06-12 22:12:41,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 499 transitions. [2021-06-12 22:12:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:12:41,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:41,553 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:41,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-12 22:12:41,553 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:41,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2064496686, now seen corresponding path program 6 times [2021-06-12 22:12:41,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:41,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953022488] [2021-06-12 22:12:41,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:41,574 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 22:12:41,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:41,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953022488] [2021-06-12 22:12:41,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953022488] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:12:41,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:12:41,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:12:41,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649790284] [2021-06-12 22:12:41,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:12:41,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:41,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:12:41,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:12:41,576 INFO L87 Difference]: Start difference. First operand 209 states and 499 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:41,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:41,624 INFO L93 Difference]: Finished difference Result 256 states and 607 transitions. [2021-06-12 22:12:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:12:41,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-06-12 22:12:41,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:41,625 INFO L225 Difference]: With dead ends: 256 [2021-06-12 22:12:41,625 INFO L226 Difference]: Without dead ends: 249 [2021-06-12 22:12:41,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:12:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-12 22:12:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 207. [2021-06-12 22:12:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.3883495145631066) internal successors, (492), 206 states have internal predecessors, (492), 0 states have call successors, (0), 0 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 22:12:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 492 transitions. [2021-06-12 22:12:41,631 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 492 transitions. Word has length 25 [2021-06-12 22:12:41,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:41,631 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 492 transitions. [2021-06-12 22:12:41,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:12:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 492 transitions. [2021-06-12 22:12:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:41,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:41,632 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:41,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-12 22:12:41,632 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:41,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2038135170, now seen corresponding path program 1 times [2021-06-12 22:12:41,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:41,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472633202] [2021-06-12 22:12:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:41,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:41,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472633202] [2021-06-12 22:12:41,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472633202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:41,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963173559] [2021-06-12 22:12:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:12:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:41,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:12:41,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:41,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963173559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:41,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:41,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 22:12:41,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120860745] [2021-06-12 22:12:41,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:12:41,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:41,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:12:41,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:41,921 INFO L87 Difference]: Start difference. First operand 207 states and 492 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 22:12:42,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:42,014 INFO L93 Difference]: Finished difference Result 387 states and 917 transitions. [2021-06-12 22:12:42,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:12:42,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) Word has length 28 [2021-06-12 22:12:42,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:42,016 INFO L225 Difference]: With dead ends: 387 [2021-06-12 22:12:42,016 INFO L226 Difference]: Without dead ends: 349 [2021-06-12 22:12:42,017 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-12 22:12:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 246. [2021-06-12 22:12:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.3510204081632655) internal successors, (576), 245 states have internal predecessors, (576), 0 states have call successors, (0), 0 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 22:12:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 576 transitions. [2021-06-12 22:12:42,022 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 576 transitions. Word has length 28 [2021-06-12 22:12:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:42,023 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 576 transitions. [2021-06-12 22:12:42,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 22:12:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 576 transitions. [2021-06-12 22:12:42,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:42,023 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:42,024 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:42,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:42,248 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash -957499002, now seen corresponding path program 2 times [2021-06-12 22:12:42,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:42,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371158495] [2021-06-12 22:12:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:42,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:42,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371158495] [2021-06-12 22:12:42,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371158495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:42,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347222017] [2021-06-12 22:12:42,352 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 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 22:12:42,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:42,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:42,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:12:42,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:42,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347222017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:42,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:42,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 22:12:42,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886514244] [2021-06-12 22:12:42,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:12:42,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:42,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:12:42,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:42,495 INFO L87 Difference]: Start difference. First operand 246 states and 576 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 22:12:42,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:42,600 INFO L93 Difference]: Finished difference Result 496 states and 1252 transitions. [2021-06-12 22:12:42,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:12:42,600 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) Word has length 28 [2021-06-12 22:12:42,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:42,602 INFO L225 Difference]: With dead ends: 496 [2021-06-12 22:12:42,603 INFO L226 Difference]: Without dead ends: 459 [2021-06-12 22:12:42,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:12:42,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-12 22:12:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 337. [2021-06-12 22:12:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.4791666666666665) internal successors, (833), 336 states have internal predecessors, (833), 0 states have call successors, (0), 0 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 22:12:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 833 transitions. [2021-06-12 22:12:42,611 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 833 transitions. Word has length 28 [2021-06-12 22:12:42,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:42,611 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 833 transitions. [2021-06-12 22:12:42,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 22:12:42,611 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 833 transitions. [2021-06-12 22:12:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:42,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:42,612 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:42,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:42,825 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:42,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:42,825 INFO L82 PathProgramCache]: Analyzing trace with hash -361393086, now seen corresponding path program 3 times [2021-06-12 22:12:42,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:42,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386613537] [2021-06-12 22:12:42,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:42,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:42,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386613537] [2021-06-12 22:12:42,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386613537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:42,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134031108] [2021-06-12 22:12:42,944 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 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 22:12:42,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:12:42,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:42,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:12:42,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:43,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134031108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:43,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:43,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 22:12:43,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631024761] [2021-06-12 22:12:43,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:12:43,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:43,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:12:43,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:43,067 INFO L87 Difference]: Start difference. First operand 337 states and 833 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 22:12:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:43,195 INFO L93 Difference]: Finished difference Result 504 states and 1265 transitions. [2021-06-12 22:12:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:12:43,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) Word has length 28 [2021-06-12 22:12:43,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:43,197 INFO L225 Difference]: With dead ends: 504 [2021-06-12 22:12:43,197 INFO L226 Difference]: Without dead ends: 462 [2021-06-12 22:12:43,198 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:12:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-12 22:12:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 331. [2021-06-12 22:12:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.4727272727272727) internal successors, (816), 330 states have internal predecessors, (816), 0 states have call successors, (0), 0 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 22:12:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 816 transitions. [2021-06-12 22:12:43,206 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 816 transitions. Word has length 28 [2021-06-12 22:12:43,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:43,206 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 816 transitions. [2021-06-12 22:12:43,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 22:12:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 816 transitions. [2021-06-12 22:12:43,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:43,207 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:43,207 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:43,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:43,430 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:43,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:43,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1418916614, now seen corresponding path program 4 times [2021-06-12 22:12:43,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:43,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637325480] [2021-06-12 22:12:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:43,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:43,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637325480] [2021-06-12 22:12:43,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637325480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:43,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111083857] [2021-06-12 22:12:43,527 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 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 22:12:43,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:43,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:43,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:12:43,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:43,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111083857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:43,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:43,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 22:12:43,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200144386] [2021-06-12 22:12:43,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:12:43,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:43,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:12:43,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:12:43,674 INFO L87 Difference]: Start difference. First operand 331 states and 816 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 22:12:43,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:43,768 INFO L93 Difference]: Finished difference Result 519 states and 1295 transitions. [2021-06-12 22:12:43,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:12:43,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 28 [2021-06-12 22:12:43,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:43,771 INFO L225 Difference]: With dead ends: 519 [2021-06-12 22:12:43,771 INFO L226 Difference]: Without dead ends: 481 [2021-06-12 22:12:43,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-12 22:12:43,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 349. [2021-06-12 22:12:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.4913793103448274) internal successors, (867), 348 states have internal predecessors, (867), 0 states have call successors, (0), 0 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 22:12:43,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 867 transitions. [2021-06-12 22:12:43,780 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 867 transitions. Word has length 28 [2021-06-12 22:12:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:43,781 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 867 transitions. [2021-06-12 22:12:43,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 22:12:43,781 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 867 transitions. [2021-06-12 22:12:43,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:43,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:43,782 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:43,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 22:12:43,995 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:43,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:43,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1124070530, now seen corresponding path program 5 times [2021-06-12 22:12:43,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:43,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122954829] [2021-06-12 22:12:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:44,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:44,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122954829] [2021-06-12 22:12:44,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122954829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:44,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209788284] [2021-06-12 22:12:44,104 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 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 22:12:44,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:12:44,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:44,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:12:44,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:44,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209788284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:44,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:44,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:12:44,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604631517] [2021-06-12 22:12:44,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:12:44,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:44,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:12:44,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:44,255 INFO L87 Difference]: Start difference. First operand 349 states and 867 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:12:44,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:44,364 INFO L93 Difference]: Finished difference Result 530 states and 1325 transitions. [2021-06-12 22:12:44,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:12:44,364 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 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 28 [2021-06-12 22:12:44,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:44,366 INFO L225 Difference]: With dead ends: 530 [2021-06-12 22:12:44,366 INFO L226 Difference]: Without dead ends: 493 [2021-06-12 22:12:44,367 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:12:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-12 22:12:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 439. [2021-06-12 22:12:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.5525114155251143) internal successors, (1118), 438 states have internal predecessors, (1118), 0 states have call successors, (0), 0 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 22:12:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1118 transitions. [2021-06-12 22:12:44,376 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1118 transitions. Word has length 28 [2021-06-12 22:12:44,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:44,376 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1118 transitions. [2021-06-12 22:12:44,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:12:44,376 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1118 transitions. [2021-06-12 22:12:44,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:44,377 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:44,377 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:44,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:44,600 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:44,601 INFO L82 PathProgramCache]: Analyzing trace with hash 152433534, now seen corresponding path program 6 times [2021-06-12 22:12:44,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:44,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751585089] [2021-06-12 22:12:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:44,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:44,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751585089] [2021-06-12 22:12:44,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751585089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:44,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66958506] [2021-06-12 22:12:44,678 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:44,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:12:44,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:44,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:12:44,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:44,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66958506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:44,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:44,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-12 22:12:44,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483294197] [2021-06-12 22:12:44,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:12:44,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:44,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:12:44,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:44,846 INFO L87 Difference]: Start difference. First operand 439 states and 1118 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 22:12:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:44,947 INFO L93 Difference]: Finished difference Result 526 states and 1316 transitions. [2021-06-12 22:12:44,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:12:44,948 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) Word has length 28 [2021-06-12 22:12:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:44,950 INFO L225 Difference]: With dead ends: 526 [2021-06-12 22:12:44,950 INFO L226 Difference]: Without dead ends: 486 [2021-06-12 22:12:44,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:12:44,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-12 22:12:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 429. [2021-06-12 22:12:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.5490654205607477) internal successors, (1091), 428 states have internal predecessors, (1091), 0 states have call successors, (0), 0 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 22:12:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1091 transitions. [2021-06-12 22:12:44,961 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1091 transitions. Word has length 28 [2021-06-12 22:12:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:44,961 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1091 transitions. [2021-06-12 22:12:44,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 22:12:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1091 transitions. [2021-06-12 22:12:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:44,962 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:44,962 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:45,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:45,186 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:45,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:45,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1703038790, now seen corresponding path program 7 times [2021-06-12 22:12:45,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:45,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946278989] [2021-06-12 22:12:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:45,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:45,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946278989] [2021-06-12 22:12:45,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946278989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:45,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455044179] [2021-06-12 22:12:45,287 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 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 22:12:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:45,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:12:45,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:45,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455044179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:45,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:45,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:12:45,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680503937] [2021-06-12 22:12:45,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:12:45,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:45,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:12:45,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:45,469 INFO L87 Difference]: Start difference. First operand 429 states and 1091 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 22:12:45,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:45,581 INFO L93 Difference]: Finished difference Result 623 states and 1567 transitions. [2021-06-12 22:12:45,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:12:45,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 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 28 [2021-06-12 22:12:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:45,587 INFO L225 Difference]: With dead ends: 623 [2021-06-12 22:12:45,587 INFO L226 Difference]: Without dead ends: 585 [2021-06-12 22:12:45,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:12:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-12 22:12:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 479. [2021-06-12 22:12:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.598326359832636) internal successors, (1242), 478 states have internal predecessors, (1242), 0 states have call successors, (0), 0 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 22:12:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1242 transitions. [2021-06-12 22:12:45,609 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1242 transitions. Word has length 28 [2021-06-12 22:12:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:45,609 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1242 transitions. [2021-06-12 22:12:45,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 22:12:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1242 transitions. [2021-06-12 22:12:45,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:45,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:45,611 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:45,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 22:12:45,833 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:45,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:45,833 INFO L82 PathProgramCache]: Analyzing trace with hash -908403066, now seen corresponding path program 8 times [2021-06-12 22:12:45,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:45,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094822770] [2021-06-12 22:12:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:45,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:45,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094822770] [2021-06-12 22:12:45,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094822770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:45,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257964999] [2021-06-12 22:12:45,938 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 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 22:12:45,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:45,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:45,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:12:45,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:46,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257964999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:46,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:46,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 22:12:46,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180753327] [2021-06-12 22:12:46,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:12:46,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:46,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:12:46,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:46,050 INFO L87 Difference]: Start difference. First operand 479 states and 1242 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 22:12:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:46,153 INFO L93 Difference]: Finished difference Result 774 states and 2027 transitions. [2021-06-12 22:12:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:12:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) Word has length 28 [2021-06-12 22:12:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:46,157 INFO L225 Difference]: With dead ends: 774 [2021-06-12 22:12:46,157 INFO L226 Difference]: Without dead ends: 737 [2021-06-12 22:12:46,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-06-12 22:12:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 491. [2021-06-12 22:12:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.595918367346939) internal successors, (1272), 490 states have internal predecessors, (1272), 0 states have call successors, (0), 0 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 22:12:46,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1272 transitions. [2021-06-12 22:12:46,168 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1272 transitions. Word has length 28 [2021-06-12 22:12:46,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:46,168 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1272 transitions. [2021-06-12 22:12:46,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 22:12:46,169 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1272 transitions. [2021-06-12 22:12:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:46,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:46,170 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:46,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 22:12:46,385 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:46,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:46,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1688905474, now seen corresponding path program 9 times [2021-06-12 22:12:46,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:46,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912086945] [2021-06-12 22:12:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:46,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:46,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912086945] [2021-06-12 22:12:46,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912086945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:46,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449918988] [2021-06-12 22:12:46,497 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 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 22:12:46,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:12:46,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:46,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:12:46,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:46,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449918988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:46,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:46,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 22:12:46,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067378749] [2021-06-12 22:12:46,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:12:46,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:46,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:12:46,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:12:46,619 INFO L87 Difference]: Start difference. First operand 491 states and 1272 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 22:12:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:46,716 INFO L93 Difference]: Finished difference Result 766 states and 2025 transitions. [2021-06-12 22:12:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:12:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 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 28 [2021-06-12 22:12:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:46,720 INFO L225 Difference]: With dead ends: 766 [2021-06-12 22:12:46,720 INFO L226 Difference]: Without dead ends: 729 [2021-06-12 22:12:46,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-06-12 22:12:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 509. [2021-06-12 22:12:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.604330708661417) internal successors, (1323), 508 states have internal predecessors, (1323), 0 states have call successors, (0), 0 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 22:12:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1323 transitions. [2021-06-12 22:12:46,731 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1323 transitions. Word has length 28 [2021-06-12 22:12:46,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:46,731 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1323 transitions. [2021-06-12 22:12:46,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 22:12:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1323 transitions. [2021-06-12 22:12:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:46,733 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:46,733 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:46,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 22:12:46,957 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:46,957 INFO L82 PathProgramCache]: Analyzing trace with hash 705112774, now seen corresponding path program 10 times [2021-06-12 22:12:46,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:46,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344484764] [2021-06-12 22:12:46,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:47,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:47,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344484764] [2021-06-12 22:12:47,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344484764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:47,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394799286] [2021-06-12 22:12:47,048 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 22:12:47,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:47,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:47,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:12:47,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:47,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394799286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:47,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:47,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 22:12:47,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530927575] [2021-06-12 22:12:47,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:12:47,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:47,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:12:47,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:47,157 INFO L87 Difference]: Start difference. First operand 509 states and 1323 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 22:12:47,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:47,311 INFO L93 Difference]: Finished difference Result 860 states and 2316 transitions. [2021-06-12 22:12:47,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:12:47,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) Word has length 28 [2021-06-12 22:12:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:47,315 INFO L225 Difference]: With dead ends: 860 [2021-06-12 22:12:47,315 INFO L226 Difference]: Without dead ends: 823 [2021-06-12 22:12:47,315 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:12:47,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-06-12 22:12:47,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 587. [2021-06-12 22:12:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.645051194539249) internal successors, (1550), 586 states have internal predecessors, (1550), 0 states have call successors, (0), 0 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 22:12:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1550 transitions. [2021-06-12 22:12:47,328 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1550 transitions. Word has length 28 [2021-06-12 22:12:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:47,328 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1550 transitions. [2021-06-12 22:12:47,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 22:12:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1550 transitions. [2021-06-12 22:12:47,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:47,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:47,330 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:47,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:47,541 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:47,541 INFO L82 PathProgramCache]: Analyzing trace with hash 586029762, now seen corresponding path program 11 times [2021-06-12 22:12:47,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:47,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359717654] [2021-06-12 22:12:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:47,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:47,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359717654] [2021-06-12 22:12:47,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359717654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:47,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743062059] [2021-06-12 22:12:47,633 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 22:12:47,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:47,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:47,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:12:47,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:47,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743062059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:47,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:47,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 22:12:47,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344169890] [2021-06-12 22:12:47,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:12:47,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:47,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:12:47,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:47,752 INFO L87 Difference]: Start difference. First operand 587 states and 1550 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 22:12:47,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:47,870 INFO L93 Difference]: Finished difference Result 864 states and 2321 transitions. [2021-06-12 22:12:47,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:12:47,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) Word has length 28 [2021-06-12 22:12:47,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:47,874 INFO L225 Difference]: With dead ends: 864 [2021-06-12 22:12:47,874 INFO L226 Difference]: Without dead ends: 822 [2021-06-12 22:12:47,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:12:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-06-12 22:12:47,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 571. [2021-06-12 22:12:47,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.645614035087719) internal successors, (1508), 570 states have internal predecessors, (1508), 0 states have call successors, (0), 0 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 22:12:47,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1508 transitions. [2021-06-12 22:12:47,887 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1508 transitions. Word has length 28 [2021-06-12 22:12:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:47,887 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1508 transitions. [2021-06-12 22:12:47,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 22:12:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1508 transitions. [2021-06-12 22:12:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:47,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:47,889 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:48,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 22:12:48,113 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:48,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:48,113 INFO L82 PathProgramCache]: Analyzing trace with hash -645966640, now seen corresponding path program 12 times [2021-06-12 22:12:48,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:48,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102242460] [2021-06-12 22:12:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:48,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:48,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102242460] [2021-06-12 22:12:48,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102242460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:48,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805540063] [2021-06-12 22:12:48,208 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 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 22:12:48,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:12:48,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:48,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:12:48,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:48,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805540063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:48,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:48,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:12:48,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139011127] [2021-06-12 22:12:48,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:12:48,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:48,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:12:48,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:12:48,361 INFO L87 Difference]: Start difference. First operand 571 states and 1508 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:12:48,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:48,473 INFO L93 Difference]: Finished difference Result 752 states and 1956 transitions. [2021-06-12 22:12:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:12:48,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 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 28 [2021-06-12 22:12:48,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:48,477 INFO L225 Difference]: With dead ends: 752 [2021-06-12 22:12:48,477 INFO L226 Difference]: Without dead ends: 715 [2021-06-12 22:12:48,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:12:48,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-06-12 22:12:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 559. [2021-06-12 22:12:48,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.6415770609319) internal successors, (1474), 558 states have internal predecessors, (1474), 0 states have call successors, (0), 0 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 22:12:48,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1474 transitions. [2021-06-12 22:12:48,509 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1474 transitions. Word has length 28 [2021-06-12 22:12:48,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:48,509 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1474 transitions. [2021-06-12 22:12:48,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:12:48,509 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1474 transitions. [2021-06-12 22:12:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:48,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:48,510 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:48,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:48,725 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:48,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:48,725 INFO L82 PathProgramCache]: Analyzing trace with hash 638629600, now seen corresponding path program 13 times [2021-06-12 22:12:48,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:48,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169609714] [2021-06-12 22:12:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:48,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:48,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169609714] [2021-06-12 22:12:48,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169609714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:48,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050988272] [2021-06-12 22:12:48,802 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 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 22:12:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:48,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:12:48,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:48,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050988272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:48,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:48,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-12 22:12:48,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664237478] [2021-06-12 22:12:48,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:12:48,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:48,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:12:48,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:48,917 INFO L87 Difference]: Start difference. First operand 559 states and 1474 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 22:12:49,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:49,001 INFO L93 Difference]: Finished difference Result 718 states and 1889 transitions. [2021-06-12 22:12:49,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:12:49,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 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 28 [2021-06-12 22:12:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:49,004 INFO L225 Difference]: With dead ends: 718 [2021-06-12 22:12:49,004 INFO L226 Difference]: Without dead ends: 681 [2021-06-12 22:12:49,004 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:12:49,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-12 22:12:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 629. [2021-06-12 22:12:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.676751592356688) internal successors, (1681), 628 states have internal predecessors, (1681), 0 states have call successors, (0), 0 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 22:12:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1681 transitions. [2021-06-12 22:12:49,016 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1681 transitions. Word has length 28 [2021-06-12 22:12:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:49,017 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1681 transitions. [2021-06-12 22:12:49,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 22:12:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1681 transitions. [2021-06-12 22:12:49,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:49,018 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:49,018 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:49,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 22:12:49,233 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:49,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:49,233 INFO L82 PathProgramCache]: Analyzing trace with hash 519546588, now seen corresponding path program 14 times [2021-06-12 22:12:49,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:49,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807021721] [2021-06-12 22:12:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:12:49,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:49,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807021721] [2021-06-12 22:12:49,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807021721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:49,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979748288] [2021-06-12 22:12:49,326 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 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 22:12:49,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:49,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:49,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:12:49,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:49,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979748288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:49,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:49,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-12 22:12:49,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294807913] [2021-06-12 22:12:49,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:12:49,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:49,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:12:49,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:49,455 INFO L87 Difference]: Start difference. First operand 629 states and 1681 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 22:12:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:49,532 INFO L93 Difference]: Finished difference Result 722 states and 1896 transitions. [2021-06-12 22:12:49,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:12:49,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 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 28 [2021-06-12 22:12:49,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:49,535 INFO L225 Difference]: With dead ends: 722 [2021-06-12 22:12:49,535 INFO L226 Difference]: Without dead ends: 682 [2021-06-12 22:12:49,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:12:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-12 22:12:49,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 573. [2021-06-12 22:12:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.645104895104895) internal successors, (1513), 572 states have internal predecessors, (1513), 0 states have call successors, (0), 0 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 22:12:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1513 transitions. [2021-06-12 22:12:49,548 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1513 transitions. Word has length 28 [2021-06-12 22:12:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:49,548 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1513 transitions. [2021-06-12 22:12:49,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 22:12:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1513 transitions. [2021-06-12 22:12:49,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:12:49,549 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:49,549 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:49,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-12 22:12:49,772 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:49,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:49,773 INFO L82 PathProgramCache]: Analyzing trace with hash 663834170, now seen corresponding path program 15 times [2021-06-12 22:12:49,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:49,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752091066] [2021-06-12 22:12:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:49,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:49,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752091066] [2021-06-12 22:12:49,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752091066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:49,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853619739] [2021-06-12 22:12:49,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:12:49,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:12:49,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:49,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:12:49,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:50,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853619739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:50,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:50,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:12:50,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136130572] [2021-06-12 22:12:50,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:12:50,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:50,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:12:50,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:12:50,050 INFO L87 Difference]: Start difference. First operand 573 states and 1513 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 22:12:50,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:50,217 INFO L93 Difference]: Finished difference Result 800 states and 2048 transitions. [2021-06-12 22:12:50,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:12:50,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 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 28 [2021-06-12 22:12:50,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:50,219 INFO L225 Difference]: With dead ends: 800 [2021-06-12 22:12:50,219 INFO L226 Difference]: Without dead ends: 762 [2021-06-12 22:12:50,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:12:50,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-12 22:12:50,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 543. [2021-06-12 22:12:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.6457564575645756) internal successors, (1434), 542 states have internal predecessors, (1434), 0 states have call successors, (0), 0 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 22:12:50,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1434 transitions. [2021-06-12 22:12:50,231 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1434 transitions. Word has length 28 [2021-06-12 22:12:50,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:50,231 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1434 transitions. [2021-06-12 22:12:50,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 22:12:50,231 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1434 transitions. [2021-06-12 22:12:50,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:50,232 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:50,232 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:50,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:50,449 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:50,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:50,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1075166198, now seen corresponding path program 16 times [2021-06-12 22:12:50,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:50,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817964106] [2021-06-12 22:12:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:50,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:50,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817964106] [2021-06-12 22:12:50,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817964106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:50,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728309823] [2021-06-12 22:12:50,477 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 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 22:12:50,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:50,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:50,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:50,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:50,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728309823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:50,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:50,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:12:50,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744095989] [2021-06-12 22:12:50,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:12:50,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:50,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:12:50,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:12:50,589 INFO L87 Difference]: Start difference. First operand 543 states and 1434 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 22:12:50,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:50,701 INFO L93 Difference]: Finished difference Result 992 states and 2597 transitions. [2021-06-12 22:12:50,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:12:50,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:50,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:50,707 INFO L225 Difference]: With dead ends: 992 [2021-06-12 22:12:50,707 INFO L226 Difference]: Without dead ends: 992 [2021-06-12 22:12:50,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:12:50,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-06-12 22:12:50,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 587. [2021-06-12 22:12:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.66382252559727) internal successors, (1561), 586 states have internal predecessors, (1561), 0 states have call successors, (0), 0 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 22:12:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1561 transitions. [2021-06-12 22:12:50,725 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1561 transitions. Word has length 31 [2021-06-12 22:12:50,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:50,725 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1561 transitions. [2021-06-12 22:12:50,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 22:12:50,725 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1561 transitions. [2021-06-12 22:12:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:50,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:50,727 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:50,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 22:12:50,953 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:50,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1496697428, now seen corresponding path program 17 times [2021-06-12 22:12:50,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:50,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821539126] [2021-06-12 22:12:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:50,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:50,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821539126] [2021-06-12 22:12:50,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821539126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:50,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338014044] [2021-06-12 22:12:50,983 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:51,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:12:51,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:51,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:51,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:51,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338014044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:51,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:51,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:12:51,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366292241] [2021-06-12 22:12:51,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:12:51,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:51,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:12:51,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:12:51,093 INFO L87 Difference]: Start difference. First operand 587 states and 1561 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 22:12:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:51,182 INFO L93 Difference]: Finished difference Result 1042 states and 2731 transitions. [2021-06-12 22:12:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:12:51,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:51,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:51,198 INFO L225 Difference]: With dead ends: 1042 [2021-06-12 22:12:51,198 INFO L226 Difference]: Without dead ends: 997 [2021-06-12 22:12:51,199 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:12:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-12 22:12:51,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 587. [2021-06-12 22:12:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.651877133105802) internal successors, (1554), 586 states have internal predecessors, (1554), 0 states have call successors, (0), 0 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 22:12:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1554 transitions. [2021-06-12 22:12:51,212 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1554 transitions. Word has length 31 [2021-06-12 22:12:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:51,212 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1554 transitions. [2021-06-12 22:12:51,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 22:12:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1554 transitions. [2021-06-12 22:12:51,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:51,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:51,214 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:51,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 22:12:51,429 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:51,429 INFO L82 PathProgramCache]: Analyzing trace with hash 73958184, now seen corresponding path program 18 times [2021-06-12 22:12:51,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:51,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281217436] [2021-06-12 22:12:51,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:51,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:51,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281217436] [2021-06-12 22:12:51,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281217436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:51,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362282928] [2021-06-12 22:12:51,460 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:51,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:12:51,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:51,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:51,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:51,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362282928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:51,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:51,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:12:51,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093543287] [2021-06-12 22:12:51,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:12:51,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:51,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:12:51,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:51,583 INFO L87 Difference]: Start difference. First operand 587 states and 1554 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 22:12:51,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:51,830 INFO L93 Difference]: Finished difference Result 2039 states and 5214 transitions. [2021-06-12 22:12:51,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:12:51,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:51,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:51,836 INFO L225 Difference]: With dead ends: 2039 [2021-06-12 22:12:51,836 INFO L226 Difference]: Without dead ends: 2039 [2021-06-12 22:12:51,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:12:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-06-12 22:12:51,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 884. [2021-06-12 22:12:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.7633069082672708) internal successors, (2440), 883 states have internal predecessors, (2440), 0 states have call successors, (0), 0 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 22:12:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2440 transitions. [2021-06-12 22:12:51,861 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2440 transitions. Word has length 31 [2021-06-12 22:12:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:51,861 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2440 transitions. [2021-06-12 22:12:51,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 22:12:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2440 transitions. [2021-06-12 22:12:51,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:51,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:51,863 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:52,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:52,073 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash -136738862, now seen corresponding path program 19 times [2021-06-12 22:12:52,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:52,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124779233] [2021-06-12 22:12:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:52,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:52,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124779233] [2021-06-12 22:12:52,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124779233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:52,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774468621] [2021-06-12 22:12:52,097 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:52,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:52,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:52,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774468621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:52,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:52,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:12:52,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240392456] [2021-06-12 22:12:52,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:12:52,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:52,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:12:52,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:52,212 INFO L87 Difference]: Start difference. First operand 884 states and 2440 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 22:12:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:52,448 INFO L93 Difference]: Finished difference Result 1980 states and 5236 transitions. [2021-06-12 22:12:52,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:12:52,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:52,457 INFO L225 Difference]: With dead ends: 1980 [2021-06-12 22:12:52,457 INFO L226 Difference]: Without dead ends: 1968 [2021-06-12 22:12:52,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:12:52,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-12 22:12:52,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1100. [2021-06-12 22:12:52,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 2.808007279344859) internal successors, (3086), 1099 states have internal predecessors, (3086), 0 states have call successors, (0), 0 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 22:12:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 3086 transitions. [2021-06-12 22:12:52,483 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 3086 transitions. Word has length 31 [2021-06-12 22:12:52,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:52,484 INFO L482 AbstractCegarLoop]: Abstraction has 1100 states and 3086 transitions. [2021-06-12 22:12:52,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 22:12:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 3086 transitions. [2021-06-12 22:12:52,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:52,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:52,486 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:52,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 22:12:52,709 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:52,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:52,709 INFO L82 PathProgramCache]: Analyzing trace with hash 592012956, now seen corresponding path program 20 times [2021-06-12 22:12:52,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:52,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142860836] [2021-06-12 22:12:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:52,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:52,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142860836] [2021-06-12 22:12:52,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142860836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:52,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223087946] [2021-06-12 22:12:52,738 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:52,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:52,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:52,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:52,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:52,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223087946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:52,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:52,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:12:52,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857821702] [2021-06-12 22:12:52,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:12:52,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:52,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:12:52,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:52,833 INFO L87 Difference]: Start difference. First operand 1100 states and 3086 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:12:53,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:53,080 INFO L93 Difference]: Finished difference Result 2053 states and 5419 transitions. [2021-06-12 22:12:53,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:12:53,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:53,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:53,084 INFO L225 Difference]: With dead ends: 2053 [2021-06-12 22:12:53,085 INFO L226 Difference]: Without dead ends: 2053 [2021-06-12 22:12:53,085 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:12:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-12 22:12:53,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1104. [2021-06-12 22:12:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 2.8068902991840434) internal successors, (3096), 1103 states have internal predecessors, (3096), 0 states have call successors, (0), 0 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 22:12:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 3096 transitions. [2021-06-12 22:12:53,111 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 3096 transitions. Word has length 31 [2021-06-12 22:12:53,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:53,111 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 3096 transitions. [2021-06-12 22:12:53,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:12:53,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 3096 transitions. [2021-06-12 22:12:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:53,113 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:53,113 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:53,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:53,335 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:53,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:53,336 INFO L82 PathProgramCache]: Analyzing trace with hash 215041802, now seen corresponding path program 21 times [2021-06-12 22:12:53,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:53,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650808846] [2021-06-12 22:12:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:53,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:53,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650808846] [2021-06-12 22:12:53,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650808846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:53,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18130393] [2021-06-12 22:12:53,363 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:53,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:12:53,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:53,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:53,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:53,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18130393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:53,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:53,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:12:53,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109621337] [2021-06-12 22:12:53,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:12:53,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:53,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:12:53,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:53,470 INFO L87 Difference]: Start difference. First operand 1104 states and 3096 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:12:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:53,660 INFO L93 Difference]: Finished difference Result 2247 states and 5856 transitions. [2021-06-12 22:12:53,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:12:53,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:53,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:53,664 INFO L225 Difference]: With dead ends: 2247 [2021-06-12 22:12:53,664 INFO L226 Difference]: Without dead ends: 2233 [2021-06-12 22:12:53,664 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:12:53,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-06-12 22:12:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1111. [2021-06-12 22:12:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 2.791891891891892) internal successors, (3099), 1110 states have internal predecessors, (3099), 0 states have call successors, (0), 0 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 22:12:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3099 transitions. [2021-06-12 22:12:53,690 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3099 transitions. Word has length 31 [2021-06-12 22:12:53,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:53,690 INFO L482 AbstractCegarLoop]: Abstraction has 1111 states and 3099 transitions. [2021-06-12 22:12:53,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:12:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3099 transitions. [2021-06-12 22:12:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:53,692 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:53,693 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:53,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 22:12:53,907 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:53,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:53,908 INFO L82 PathProgramCache]: Analyzing trace with hash 299440576, now seen corresponding path program 22 times [2021-06-12 22:12:53,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:53,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658900954] [2021-06-12 22:12:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:53,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:53,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658900954] [2021-06-12 22:12:53,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658900954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:53,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507738230] [2021-06-12 22:12:53,934 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:53,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:53,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:53,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:53,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:54,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507738230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:54,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:54,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:12:54,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142560669] [2021-06-12 22:12:54,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:12:54,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:54,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:12:54,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:54,038 INFO L87 Difference]: Start difference. First operand 1111 states and 3099 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:12:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:54,167 INFO L93 Difference]: Finished difference Result 1836 states and 4940 transitions. [2021-06-12 22:12:54,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:12:54,168 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:54,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:54,171 INFO L225 Difference]: With dead ends: 1836 [2021-06-12 22:12:54,171 INFO L226 Difference]: Without dead ends: 1808 [2021-06-12 22:12:54,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:12:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2021-06-12 22:12:54,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1121. [2021-06-12 22:12:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.775) internal successors, (3108), 1120 states have internal predecessors, (3108), 0 states have call successors, (0), 0 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 22:12:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3108 transitions. [2021-06-12 22:12:54,195 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3108 transitions. Word has length 31 [2021-06-12 22:12:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:54,195 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 3108 transitions. [2021-06-12 22:12:54,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:12:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3108 transitions. [2021-06-12 22:12:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:54,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:54,197 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:54,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 22:12:54,401 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:54,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2072647434, now seen corresponding path program 23 times [2021-06-12 22:12:54,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:54,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502050184] [2021-06-12 22:12:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:54,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:54,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502050184] [2021-06-12 22:12:54,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502050184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:54,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757887433] [2021-06-12 22:12:54,427 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:54,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:12:54,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:54,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:54,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757887433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:54,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:54,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 22:12:54,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342202937] [2021-06-12 22:12:54,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:12:54,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:54,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:12:54,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:12:54,557 INFO L87 Difference]: Start difference. First operand 1121 states and 3108 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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 22:12:54,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:54,782 INFO L93 Difference]: Finished difference Result 2462 states and 6556 transitions. [2021-06-12 22:12:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:12:54,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) Word has length 31 [2021-06-12 22:12:54,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:54,788 INFO L225 Difference]: With dead ends: 2462 [2021-06-12 22:12:54,788 INFO L226 Difference]: Without dead ends: 2408 [2021-06-12 22:12:54,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:12:54,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-06-12 22:12:54,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 1441. [2021-06-12 22:12:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 2.8208333333333333) internal successors, (4062), 1440 states have internal predecessors, (4062), 0 states have call successors, (0), 0 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 22:12:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 4062 transitions. [2021-06-12 22:12:54,827 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 4062 transitions. Word has length 31 [2021-06-12 22:12:54,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:54,827 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 4062 transitions. [2021-06-12 22:12:54,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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 22:12:54,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 4062 transitions. [2021-06-12 22:12:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:54,830 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:54,830 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:55,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-12 22:12:55,054 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:55,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:55,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1805660222, now seen corresponding path program 24 times [2021-06-12 22:12:55,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:55,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492891884] [2021-06-12 22:12:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:55,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:55,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492891884] [2021-06-12 22:12:55,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492891884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:55,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672269205] [2021-06-12 22:12:55,077 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:55,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:12:55,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:55,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:55,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:55,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672269205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:55,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:55,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 22:12:55,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183379901] [2021-06-12 22:12:55,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:12:55,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:55,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:12:55,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:55,186 INFO L87 Difference]: Start difference. First operand 1441 states and 4062 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 22:12:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:55,399 INFO L93 Difference]: Finished difference Result 2786 states and 7510 transitions. [2021-06-12 22:12:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:12:55,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:55,413 INFO L225 Difference]: With dead ends: 2786 [2021-06-12 22:12:55,414 INFO L226 Difference]: Without dead ends: 2786 [2021-06-12 22:12:55,414 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:12:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-06-12 22:12:55,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1845. [2021-06-12 22:12:55,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1844 states have (on average 2.828633405639913) internal successors, (5216), 1844 states have internal predecessors, (5216), 0 states have call successors, (0), 0 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 22:12:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 5216 transitions. [2021-06-12 22:12:55,448 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 5216 transitions. Word has length 31 [2021-06-12 22:12:55,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:55,448 INFO L482 AbstractCegarLoop]: Abstraction has 1845 states and 5216 transitions. [2021-06-12 22:12:55,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 22:12:55,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 5216 transitions. [2021-06-12 22:12:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:55,451 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:55,451 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:55,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:55,675 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:55,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:55,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1164137342, now seen corresponding path program 25 times [2021-06-12 22:12:55,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:55,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874073961] [2021-06-12 22:12:55,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:55,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:55,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874073961] [2021-06-12 22:12:55,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874073961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:55,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884322452] [2021-06-12 22:12:55,701 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:55,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:55,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:55,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884322452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:55,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:55,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:12:55,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658748124] [2021-06-12 22:12:55,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:12:55,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:55,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:12:55,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:12:55,795 INFO L87 Difference]: Start difference. First operand 1845 states and 5216 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 22:12:55,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:55,912 INFO L93 Difference]: Finished difference Result 2330 states and 6455 transitions. [2021-06-12 22:12:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:12:55,913 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:55,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:55,916 INFO L225 Difference]: With dead ends: 2330 [2021-06-12 22:12:55,917 INFO L226 Difference]: Without dead ends: 2330 [2021-06-12 22:12:55,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:12:55,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-06-12 22:12:55,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1887. [2021-06-12 22:12:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.829798515376458) internal successors, (5337), 1886 states have internal predecessors, (5337), 0 states have call successors, (0), 0 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 22:12:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5337 transitions. [2021-06-12 22:12:55,950 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5337 transitions. Word has length 31 [2021-06-12 22:12:55,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:55,952 INFO L482 AbstractCegarLoop]: Abstraction has 1887 states and 5337 transitions. [2021-06-12 22:12:55,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 22:12:55,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5337 transitions. [2021-06-12 22:12:55,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:55,955 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:55,955 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:56,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 22:12:56,179 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:56,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:56,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1736902034, now seen corresponding path program 26 times [2021-06-12 22:12:56,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:56,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997191368] [2021-06-12 22:12:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:56,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:56,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997191368] [2021-06-12 22:12:56,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997191368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:56,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201797313] [2021-06-12 22:12:56,206 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:56,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:56,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:56,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:56,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:56,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201797313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:56,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:56,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:12:56,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712903158] [2021-06-12 22:12:56,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:12:56,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:56,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:12:56,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:12:56,287 INFO L87 Difference]: Start difference. First operand 1887 states and 5337 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 22:12:56,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:56,365 INFO L93 Difference]: Finished difference Result 2501 states and 6932 transitions. [2021-06-12 22:12:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:12:56,365 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:56,368 INFO L225 Difference]: With dead ends: 2501 [2021-06-12 22:12:56,368 INFO L226 Difference]: Without dead ends: 2465 [2021-06-12 22:12:56,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:12:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-06-12 22:12:56,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1887. [2021-06-12 22:12:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.8266171792152703) internal successors, (5331), 1886 states have internal predecessors, (5331), 0 states have call successors, (0), 0 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 22:12:56,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5331 transitions. [2021-06-12 22:12:56,416 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5331 transitions. Word has length 31 [2021-06-12 22:12:56,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:56,416 INFO L482 AbstractCegarLoop]: Abstraction has 1887 states and 5331 transitions. [2021-06-12 22:12:56,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 22:12:56,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5331 transitions. [2021-06-12 22:12:56,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:56,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:56,419 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:56,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:56,642 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:56,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:56,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1310615324, now seen corresponding path program 27 times [2021-06-12 22:12:56,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:56,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460735568] [2021-06-12 22:12:56,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:56,673 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 22:12:56,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:56,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460735568] [2021-06-12 22:12:56,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460735568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:56,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938492448] [2021-06-12 22:12:56,674 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:56,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:12:56,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:56,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:56,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938492448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:56,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:56,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:12:56,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176758464] [2021-06-12 22:12:56,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:12:56,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:56,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:12:56,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:56,770 INFO L87 Difference]: Start difference. First operand 1887 states and 5331 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 22:12:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:56,914 INFO L93 Difference]: Finished difference Result 2490 states and 6843 transitions. [2021-06-12 22:12:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:12:56,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:56,917 INFO L225 Difference]: With dead ends: 2490 [2021-06-12 22:12:56,917 INFO L226 Difference]: Without dead ends: 2490 [2021-06-12 22:12:56,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:12:56,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-06-12 22:12:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2067. [2021-06-12 22:12:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 2.8330106485963213) internal successors, (5853), 2066 states have internal predecessors, (5853), 0 states have call successors, (0), 0 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 22:12:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 5853 transitions. [2021-06-12 22:12:56,942 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 5853 transitions. Word has length 31 [2021-06-12 22:12:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:56,942 INFO L482 AbstractCegarLoop]: Abstraction has 2067 states and 5853 transitions. [2021-06-12 22:12:56,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 22:12:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 5853 transitions. [2021-06-12 22:12:56,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:56,945 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:56,945 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:57,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 22:12:57,161 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:57,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:57,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1055874042, now seen corresponding path program 28 times [2021-06-12 22:12:57,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:57,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922196025] [2021-06-12 22:12:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:57,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:57,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922196025] [2021-06-12 22:12:57,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922196025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:57,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743929519] [2021-06-12 22:12:57,187 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:57,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:57,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:57,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:57,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:57,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743929519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:57,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:57,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:12:57,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264343713] [2021-06-12 22:12:57,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:12:57,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:57,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:12:57,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:57,283 INFO L87 Difference]: Start difference. First operand 2067 states and 5853 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 22:12:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:57,455 INFO L93 Difference]: Finished difference Result 2862 states and 7833 transitions. [2021-06-12 22:12:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:12:57,455 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:57,458 INFO L225 Difference]: With dead ends: 2862 [2021-06-12 22:12:57,459 INFO L226 Difference]: Without dead ends: 2838 [2021-06-12 22:12:57,459 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:12:57,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-06-12 22:12:57,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2147. [2021-06-12 22:12:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 2.8355079217148185) internal successors, (6085), 2146 states have internal predecessors, (6085), 0 states have call successors, (0), 0 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 22:12:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 6085 transitions. [2021-06-12 22:12:57,502 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 6085 transitions. Word has length 31 [2021-06-12 22:12:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:57,503 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 6085 transitions. [2021-06-12 22:12:57,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 22:12:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 6085 transitions. [2021-06-12 22:12:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:57,506 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:57,506 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:57,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 22:12:57,721 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:57,721 INFO L82 PathProgramCache]: Analyzing trace with hash -276839870, now seen corresponding path program 29 times [2021-06-12 22:12:57,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:57,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529379063] [2021-06-12 22:12:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:57,752 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 22:12:57,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:57,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529379063] [2021-06-12 22:12:57,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529379063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:57,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293358772] [2021-06-12 22:12:57,752 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:57,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:12:57,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:57,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:57,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:57,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293358772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:57,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:57,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:12:57,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783875789] [2021-06-12 22:12:57,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:12:57,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:57,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:12:57,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:57,865 INFO L87 Difference]: Start difference. First operand 2147 states and 6085 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 22:12:58,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:58,090 INFO L93 Difference]: Finished difference Result 3330 states and 8999 transitions. [2021-06-12 22:12:58,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:12:58,090 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:58,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:58,094 INFO L225 Difference]: With dead ends: 3330 [2021-06-12 22:12:58,094 INFO L226 Difference]: Without dead ends: 3330 [2021-06-12 22:12:58,094 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:12:58,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-06-12 22:12:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2317. [2021-06-12 22:12:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 2.8626943005181347) internal successors, (6630), 2316 states have internal predecessors, (6630), 0 states have call successors, (0), 0 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 22:12:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 6630 transitions. [2021-06-12 22:12:58,134 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 6630 transitions. Word has length 31 [2021-06-12 22:12:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:58,134 INFO L482 AbstractCegarLoop]: Abstraction has 2317 states and 6630 transitions. [2021-06-12 22:12:58,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 22:12:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 6630 transitions. [2021-06-12 22:12:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:58,138 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:58,138 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:58,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 22:12:58,353 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:58,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:58,353 INFO L82 PathProgramCache]: Analyzing trace with hash -487536916, now seen corresponding path program 30 times [2021-06-12 22:12:58,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:58,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473067704] [2021-06-12 22:12:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:58,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:58,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473067704] [2021-06-12 22:12:58,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473067704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:58,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484396854] [2021-06-12 22:12:58,382 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:58,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:12:58,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:58,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:58,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:58,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484396854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:58,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:58,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:12:58,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498517521] [2021-06-12 22:12:58,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:12:58,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:58,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:12:58,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:58,485 INFO L87 Difference]: Start difference. First operand 2317 states and 6630 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 22:12:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:58,718 INFO L93 Difference]: Finished difference Result 3536 states and 9738 transitions. [2021-06-12 22:12:58,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:12:58,718 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:58,724 INFO L225 Difference]: With dead ends: 3536 [2021-06-12 22:12:58,724 INFO L226 Difference]: Without dead ends: 3524 [2021-06-12 22:12:58,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:12:58,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3524 states. [2021-06-12 22:12:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3524 to 2553. [2021-06-12 22:12:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 2.865203761755486) internal successors, (7312), 2552 states have internal predecessors, (7312), 0 states have call successors, (0), 0 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 22:12:58,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 7312 transitions. [2021-06-12 22:12:58,773 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 7312 transitions. Word has length 31 [2021-06-12 22:12:58,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:58,774 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 7312 transitions. [2021-06-12 22:12:58,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 22:12:58,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 7312 transitions. [2021-06-12 22:12:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:58,778 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:58,778 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:59,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 22:12:59,001 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:59,001 INFO L82 PathProgramCache]: Analyzing trace with hash 241214902, now seen corresponding path program 31 times [2021-06-12 22:12:59,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:59,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017131436] [2021-06-12 22:12:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:59,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:59,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017131436] [2021-06-12 22:12:59,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017131436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:59,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539938641] [2021-06-12 22:12:59,028 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:59,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:59,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:59,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539938641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:59,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:59,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:12:59,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008305691] [2021-06-12 22:12:59,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:12:59,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:59,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:12:59,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:59,132 INFO L87 Difference]: Start difference. First operand 2553 states and 7312 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:12:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:59,393 INFO L93 Difference]: Finished difference Result 3564 states and 9736 transitions. [2021-06-12 22:12:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:12:59,393 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 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 31 [2021-06-12 22:12:59,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:59,398 INFO L225 Difference]: With dead ends: 3564 [2021-06-12 22:12:59,398 INFO L226 Difference]: Without dead ends: 3564 [2021-06-12 22:12:59,399 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:12:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-06-12 22:12:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2557. [2021-06-12 22:12:59,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2557 states, 2556 states have (on average 2.856025039123631) internal successors, (7300), 2556 states have internal predecessors, (7300), 0 states have call successors, (0), 0 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 22:12:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 7300 transitions. [2021-06-12 22:12:59,472 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 7300 transitions. Word has length 31 [2021-06-12 22:12:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:59,472 INFO L482 AbstractCegarLoop]: Abstraction has 2557 states and 7300 transitions. [2021-06-12 22:12:59,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:12:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 7300 transitions. [2021-06-12 22:12:59,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:12:59,476 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:59,476 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:59,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 22:12:59,700 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:59,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:59,700 INFO L82 PathProgramCache]: Analyzing trace with hash -135756252, now seen corresponding path program 32 times [2021-06-12 22:12:59,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:59,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791613790] [2021-06-12 22:12:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:59,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:59,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791613790] [2021-06-12 22:12:59,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791613790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:59,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039313854] [2021-06-12 22:12:59,725 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:59,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:59,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:59,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:12:59,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:59,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039313854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:59,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:59,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:12:59,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664628465] [2021-06-12 22:12:59,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:12:59,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:59,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:12:59,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:12:59,814 INFO L87 Difference]: Start difference. First operand 2557 states and 7300 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:13:00,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:00,021 INFO L93 Difference]: Finished difference Result 3120 states and 8617 transitions. [2021-06-12 22:13:00,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:13:00,022 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 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 31 [2021-06-12 22:13:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:00,026 INFO L225 Difference]: With dead ends: 3120 [2021-06-12 22:13:00,026 INFO L226 Difference]: Without dead ends: 3106 [2021-06-12 22:13:00,027 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:13:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2021-06-12 22:13:00,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 2571. [2021-06-12 22:13:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 2570 states have (on average 2.849805447470817) internal successors, (7324), 2570 states have internal predecessors, (7324), 0 states have call successors, (0), 0 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 22:13:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 7324 transitions. [2021-06-12 22:13:00,063 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 7324 transitions. Word has length 31 [2021-06-12 22:13:00,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:00,063 INFO L482 AbstractCegarLoop]: Abstraction has 2571 states and 7324 transitions. [2021-06-12 22:13:00,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 22:13:00,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 7324 transitions. [2021-06-12 22:13:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:13:00,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:00,066 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:00,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 22:13:00,267 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:00,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:00,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2133092770, now seen corresponding path program 33 times [2021-06-12 22:13:00,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:00,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097783157] [2021-06-12 22:13:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:00,293 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 22:13:00,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:00,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097783157] [2021-06-12 22:13:00,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097783157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:00,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684870561] [2021-06-12 22:13:00,294 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:00,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:13:00,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:00,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:13:00,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:00,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684870561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:00,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:00,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 22:13:00,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144268415] [2021-06-12 22:13:00,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:13:00,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:00,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:13:00,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:13:00,418 INFO L87 Difference]: Start difference. First operand 2571 states and 7324 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 22:13:00,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:00,634 INFO L93 Difference]: Finished difference Result 3644 states and 10056 transitions. [2021-06-12 22:13:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:13:00,634 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 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 31 [2021-06-12 22:13:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:00,638 INFO L225 Difference]: With dead ends: 3644 [2021-06-12 22:13:00,638 INFO L226 Difference]: Without dead ends: 3644 [2021-06-12 22:13:00,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:13:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-06-12 22:13:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 2693. [2021-06-12 22:13:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 2692 states have (on average 2.846582466567608) internal successors, (7663), 2692 states have internal predecessors, (7663), 0 states have call successors, (0), 0 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 22:13:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 7663 transitions. [2021-06-12 22:13:00,670 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 7663 transitions. Word has length 31 [2021-06-12 22:13:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:00,670 INFO L482 AbstractCegarLoop]: Abstraction has 2693 states and 7663 transitions. [2021-06-12 22:13:00,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 22:13:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 7663 transitions. [2021-06-12 22:13:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:13:00,675 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:00,675 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:00,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-12 22:13:00,889 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:00,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1233797400, now seen corresponding path program 34 times [2021-06-12 22:13:00,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:00,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499922766] [2021-06-12 22:13:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:00,912 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 22:13:00,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:00,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499922766] [2021-06-12 22:13:00,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499922766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:00,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756533492] [2021-06-12 22:13:00,913 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:00,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:00,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:00,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:13:00,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:01,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756533492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:01,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:01,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 22:13:01,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823484995] [2021-06-12 22:13:01,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:13:01,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:01,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:13:01,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:13:01,042 INFO L87 Difference]: Start difference. First operand 2693 states and 7663 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 22:13:01,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:01,247 INFO L93 Difference]: Finished difference Result 4193 states and 11519 transitions. [2021-06-12 22:13:01,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:13:01,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 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 31 [2021-06-12 22:13:01,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:01,251 INFO L225 Difference]: With dead ends: 4193 [2021-06-12 22:13:01,252 INFO L226 Difference]: Without dead ends: 4193 [2021-06-12 22:13:01,252 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:13:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-06-12 22:13:01,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3161. [2021-06-12 22:13:01,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3160 states have (on average 2.854113924050633) internal successors, (9019), 3160 states have internal predecessors, (9019), 0 states have call successors, (0), 0 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 22:13:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 9019 transitions. [2021-06-12 22:13:01,296 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 9019 transitions. Word has length 31 [2021-06-12 22:13:01,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:01,296 INFO L482 AbstractCegarLoop]: Abstraction has 3161 states and 9019 transitions. [2021-06-12 22:13:01,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 22:13:01,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 9019 transitions. [2021-06-12 22:13:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:13:01,302 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:01,302 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:01,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:01,524 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:01,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:01,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1092713782, now seen corresponding path program 35 times [2021-06-12 22:13:01,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:01,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313475298] [2021-06-12 22:13:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:13:01,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:01,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313475298] [2021-06-12 22:13:01,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313475298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:01,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940794151] [2021-06-12 22:13:01,546 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:01,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:13:01,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:01,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:13:01,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:01,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940794151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:01,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:01,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 22:13:01,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645907779] [2021-06-12 22:13:01,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:13:01,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:01,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:13:01,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:13:01,665 INFO L87 Difference]: Start difference. First operand 3161 states and 9019 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 22:13:01,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:01,856 INFO L93 Difference]: Finished difference Result 4026 states and 11093 transitions. [2021-06-12 22:13:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:13:01,856 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 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 31 [2021-06-12 22:13:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:01,860 INFO L225 Difference]: With dead ends: 4026 [2021-06-12 22:13:01,860 INFO L226 Difference]: Without dead ends: 4012 [2021-06-12 22:13:01,860 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:13:01,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4012 states. [2021-06-12 22:13:01,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4012 to 3057. [2021-06-12 22:13:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 3056 states have (on average 2.8406413612565444) internal successors, (8681), 3056 states have internal predecessors, (8681), 0 states have call successors, (0), 0 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 22:13:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 8681 transitions. [2021-06-12 22:13:01,897 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 8681 transitions. Word has length 31 [2021-06-12 22:13:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:01,897 INFO L482 AbstractCegarLoop]: Abstraction has 3057 states and 8681 transitions. [2021-06-12 22:13:01,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 22:13:01,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 8681 transitions. [2021-06-12 22:13:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:13:01,901 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:01,901 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:02,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:02,101 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:02,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1008315008, now seen corresponding path program 36 times [2021-06-12 22:13:02,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:02,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570891780] [2021-06-12 22:13:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:02,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:02,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570891780] [2021-06-12 22:13:02,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570891780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:02,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849050544] [2021-06-12 22:13:02,128 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:02,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:13:02,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:02,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:13:02,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:02,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849050544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:02,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:02,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 22:13:02,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000390318] [2021-06-12 22:13:02,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:13:02,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:02,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:13:02,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:13:02,230 INFO L87 Difference]: Start difference. First operand 3057 states and 8681 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 22:13:02,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:02,416 INFO L93 Difference]: Finished difference Result 4063 states and 11292 transitions. [2021-06-12 22:13:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:13:02,417 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 31 [2021-06-12 22:13:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:02,421 INFO L225 Difference]: With dead ends: 4063 [2021-06-12 22:13:02,421 INFO L226 Difference]: Without dead ends: 4007 [2021-06-12 22:13:02,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:13:02,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-06-12 22:13:02,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3327. [2021-06-12 22:13:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.850871918220084) internal successors, (9482), 3326 states have internal predecessors, (9482), 0 states have call successors, (0), 0 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 22:13:02,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 9482 transitions. [2021-06-12 22:13:02,485 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 9482 transitions. Word has length 31 [2021-06-12 22:13:02,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:02,485 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 9482 transitions. [2021-06-12 22:13:02,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 22:13:02,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 9482 transitions. [2021-06-12 22:13:02,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:02,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:02,489 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:02,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:02,690 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:02,690 INFO L82 PathProgramCache]: Analyzing trace with hash 225377440, now seen corresponding path program 37 times [2021-06-12 22:13:02,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:02,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534148240] [2021-06-12 22:13:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:02,849 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 22:13:02,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:02,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534148240] [2021-06-12 22:13:02,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534148240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:02,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42526634] [2021-06-12 22:13:02,849 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:02,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:02,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:03,067 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 22:13:03,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42526634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:03,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:03,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 22:13:03,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902291406] [2021-06-12 22:13:03,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:13:03,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:03,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:13:03,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:13:03,068 INFO L87 Difference]: Start difference. First operand 3327 states and 9482 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:13:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:03,201 INFO L93 Difference]: Finished difference Result 5088 states and 14550 transitions. [2021-06-12 22:13:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:13:03,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:03,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:03,207 INFO L225 Difference]: With dead ends: 5088 [2021-06-12 22:13:03,207 INFO L226 Difference]: Without dead ends: 5050 [2021-06-12 22:13:03,207 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2021-06-12 22:13:03,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 3355. [2021-06-12 22:13:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 2.8449612403100777) internal successors, (9542), 3354 states have internal predecessors, (9542), 0 states have call successors, (0), 0 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 22:13:03,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 9542 transitions. [2021-06-12 22:13:03,253 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 9542 transitions. Word has length 34 [2021-06-12 22:13:03,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:03,253 INFO L482 AbstractCegarLoop]: Abstraction has 3355 states and 9542 transitions. [2021-06-12 22:13:03,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:13:03,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 9542 transitions. [2021-06-12 22:13:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:03,259 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:03,259 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:03,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 22:13:03,478 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:03,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:03,478 INFO L82 PathProgramCache]: Analyzing trace with hash -236314294, now seen corresponding path program 38 times [2021-06-12 22:13:03,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:03,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793352600] [2021-06-12 22:13:03,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:03,617 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 22:13:03,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:03,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793352600] [2021-06-12 22:13:03,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793352600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:03,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713705879] [2021-06-12 22:13:03,617 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:03,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:03,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:03,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:03,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:03,847 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 22:13:03,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713705879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:03,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:03,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:13:03,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631877276] [2021-06-12 22:13:03,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:13:03,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:03,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:13:03,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:13:03,849 INFO L87 Difference]: Start difference. First operand 3355 states and 9542 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:04,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:04,168 INFO L93 Difference]: Finished difference Result 6932 states and 19936 transitions. [2021-06-12 22:13:04,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:13:04,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:04,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:04,179 INFO L225 Difference]: With dead ends: 6932 [2021-06-12 22:13:04,179 INFO L226 Difference]: Without dead ends: 6850 [2021-06-12 22:13:04,179 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:13:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6850 states. [2021-06-12 22:13:04,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6850 to 4710. [2021-06-12 22:13:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4710 states, 4709 states have (on average 2.8789551921851775) internal successors, (13557), 4709 states have internal predecessors, (13557), 0 states have call successors, (0), 0 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 22:13:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4710 states to 4710 states and 13557 transitions. [2021-06-12 22:13:04,270 INFO L78 Accepts]: Start accepts. Automaton has 4710 states and 13557 transitions. Word has length 34 [2021-06-12 22:13:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:04,270 INFO L482 AbstractCegarLoop]: Abstraction has 4710 states and 13557 transitions. [2021-06-12 22:13:04,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4710 states and 13557 transitions. [2021-06-12 22:13:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:04,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:04,278 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:04,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:04,500 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:04,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash 359791622, now seen corresponding path program 39 times [2021-06-12 22:13:04,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:04,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350247846] [2021-06-12 22:13:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:04,622 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 22:13:04,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:04,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350247846] [2021-06-12 22:13:04,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350247846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:04,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646109831] [2021-06-12 22:13:04,622 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:04,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:13:04,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:04,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:04,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:04,866 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 22:13:04,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646109831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:04,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:04,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:13:04,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305325591] [2021-06-12 22:13:04,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:13:04,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:04,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:13:04,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:13:04,867 INFO L87 Difference]: Start difference. First operand 4710 states and 13557 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:05,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:05,155 INFO L93 Difference]: Finished difference Result 6936 states and 19938 transitions. [2021-06-12 22:13:05,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:13:05,156 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:05,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:05,167 INFO L225 Difference]: With dead ends: 6936 [2021-06-12 22:13:05,167 INFO L226 Difference]: Without dead ends: 6824 [2021-06-12 22:13:05,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:13:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6824 states. [2021-06-12 22:13:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6824 to 4404. [2021-06-12 22:13:05,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 4403 states have (on average 2.865319100613218) internal successors, (12616), 4403 states have internal predecessors, (12616), 0 states have call successors, (0), 0 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 22:13:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 12616 transitions. [2021-06-12 22:13:05,241 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 12616 transitions. Word has length 34 [2021-06-12 22:13:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:05,241 INFO L482 AbstractCegarLoop]: Abstraction has 4404 states and 12616 transitions. [2021-06-12 22:13:05,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 12616 transitions. [2021-06-12 22:13:05,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:05,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:05,246 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:05,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 22:13:05,447 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:05,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:05,447 INFO L82 PathProgramCache]: Analyzing trace with hash -697731906, now seen corresponding path program 40 times [2021-06-12 22:13:05,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:05,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572671368] [2021-06-12 22:13:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:05,570 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 22:13:05,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:05,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572671368] [2021-06-12 22:13:05,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572671368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:05,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392834672] [2021-06-12 22:13:05,570 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:05,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:05,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:05,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:05,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:05,746 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 22:13:05,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392834672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:05,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:05,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:13:05,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736299699] [2021-06-12 22:13:05,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:13:05,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:05,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:13:05,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:13:05,747 INFO L87 Difference]: Start difference. First operand 4404 states and 12616 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:05,940 INFO L93 Difference]: Finished difference Result 6717 states and 19331 transitions. [2021-06-12 22:13:05,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:13:05,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:05,949 INFO L225 Difference]: With dead ends: 6717 [2021-06-12 22:13:05,950 INFO L226 Difference]: Without dead ends: 6641 [2021-06-12 22:13:05,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6641 states. [2021-06-12 22:13:06,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6641 to 4682. [2021-06-12 22:13:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4682 states, 4681 states have (on average 2.87267677846614) internal successors, (13447), 4681 states have internal predecessors, (13447), 0 states have call successors, (0), 0 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 22:13:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4682 states to 4682 states and 13447 transitions. [2021-06-12 22:13:06,041 INFO L78 Accepts]: Start accepts. Automaton has 4682 states and 13447 transitions. Word has length 34 [2021-06-12 22:13:06,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:06,041 INFO L482 AbstractCegarLoop]: Abstraction has 4682 states and 13447 transitions. [2021-06-12 22:13:06,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 4682 states and 13447 transitions. [2021-06-12 22:13:06,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:06,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:06,047 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:06,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-12 22:13:06,247 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:06,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:06,247 INFO L82 PathProgramCache]: Analyzing trace with hash 480842916, now seen corresponding path program 41 times [2021-06-12 22:13:06,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:06,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775174461] [2021-06-12 22:13:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:06,361 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 22:13:06,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:06,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775174461] [2021-06-12 22:13:06,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775174461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:06,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332248783] [2021-06-12 22:13:06,362 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:06,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:13:06,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:06,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:06,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:06,567 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 22:13:06,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332248783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:06,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:06,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:13:06,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977045618] [2021-06-12 22:13:06,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:13:06,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:06,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:13:06,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:13:06,568 INFO L87 Difference]: Start difference. First operand 4682 states and 13447 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:06,760 INFO L93 Difference]: Finished difference Result 6651 states and 19193 transitions. [2021-06-12 22:13:06,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:13:06,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:06,800 INFO L225 Difference]: With dead ends: 6651 [2021-06-12 22:13:06,801 INFO L226 Difference]: Without dead ends: 6613 [2021-06-12 22:13:06,801 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6613 states. [2021-06-12 22:13:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6613 to 4704. [2021-06-12 22:13:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4703 states have (on average 2.8730597490963214) internal successors, (13512), 4703 states have internal predecessors, (13512), 0 states have call successors, (0), 0 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 22:13:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 13512 transitions. [2021-06-12 22:13:06,894 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 13512 transitions. Word has length 34 [2021-06-12 22:13:06,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:06,894 INFO L482 AbstractCegarLoop]: Abstraction has 4704 states and 13512 transitions. [2021-06-12 22:13:06,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 13512 transitions. [2021-06-12 22:13:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:06,900 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:06,900 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:07,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:07,101 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:07,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:07,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1249457240, now seen corresponding path program 42 times [2021-06-12 22:13:07,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:07,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884801443] [2021-06-12 22:13:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:07,216 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 22:13:07,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:07,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884801443] [2021-06-12 22:13:07,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884801443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:07,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670806484] [2021-06-12 22:13:07,217 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:07,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:13:07,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:07,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:13:07,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:07,446 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 22:13:07,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670806484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:07,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:07,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 22:13:07,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865166256] [2021-06-12 22:13:07,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:13:07,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:07,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:13:07,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:13:07,448 INFO L87 Difference]: Start difference. First operand 4704 states and 13512 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:13:07,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:07,902 INFO L93 Difference]: Finished difference Result 7194 states and 20574 transitions. [2021-06-12 22:13:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:13:07,903 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:07,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:07,911 INFO L225 Difference]: With dead ends: 7194 [2021-06-12 22:13:07,912 INFO L226 Difference]: Without dead ends: 7092 [2021-06-12 22:13:07,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 424.0ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:13:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2021-06-12 22:13:07,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 6468. [2021-06-12 22:13:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6468 states, 6467 states have (on average 2.9008813978660895) internal successors, (18760), 6467 states have internal predecessors, (18760), 0 states have call successors, (0), 0 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 22:13:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6468 states to 6468 states and 18760 transitions. [2021-06-12 22:13:08,012 INFO L78 Accepts]: Start accepts. Automaton has 6468 states and 18760 transitions. Word has length 34 [2021-06-12 22:13:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:08,012 INFO L482 AbstractCegarLoop]: Abstraction has 6468 states and 18760 transitions. [2021-06-12 22:13:08,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:13:08,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6468 states and 18760 transitions. [2021-06-12 22:13:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:08,020 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:08,020 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:08,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-12 22:13:08,221 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:08,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1769005992, now seen corresponding path program 43 times [2021-06-12 22:13:08,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:08,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659636639] [2021-06-12 22:13:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:08,325 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 22:13:08,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:08,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659636639] [2021-06-12 22:13:08,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659636639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:08,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067803998] [2021-06-12 22:13:08,326 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:08,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:08,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:08,517 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 22:13:08,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067803998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:08,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:08,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 22:13:08,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101226588] [2021-06-12 22:13:08,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:13:08,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:08,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:13:08,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:13:08,518 INFO L87 Difference]: Start difference. First operand 6468 states and 18760 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:08,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:08,754 INFO L93 Difference]: Finished difference Result 7452 states and 21366 transitions. [2021-06-12 22:13:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:13:08,754 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:08,764 INFO L225 Difference]: With dead ends: 7452 [2021-06-12 22:13:08,764 INFO L226 Difference]: Without dead ends: 7330 [2021-06-12 22:13:08,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:13:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-06-12 22:13:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 5896. [2021-06-12 22:13:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5896 states, 5895 states have (on average 2.891263782866836) internal successors, (17044), 5895 states have internal predecessors, (17044), 0 states have call successors, (0), 0 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 22:13:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 17044 transitions. [2021-06-12 22:13:08,881 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 17044 transitions. Word has length 34 [2021-06-12 22:13:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:08,881 INFO L482 AbstractCegarLoop]: Abstraction has 5896 states and 17044 transitions. [2021-06-12 22:13:08,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 17044 transitions. [2021-06-12 22:13:08,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:08,888 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:08,888 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:09,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:09,088 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:09,089 INFO L82 PathProgramCache]: Analyzing trace with hash -218400736, now seen corresponding path program 44 times [2021-06-12 22:13:09,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:09,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235343328] [2021-06-12 22:13:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:09,200 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 22:13:09,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:09,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235343328] [2021-06-12 22:13:09,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235343328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:09,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943037604] [2021-06-12 22:13:09,201 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:09,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:09,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:09,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:09,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:09,398 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 22:13:09,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943037604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:09,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:09,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 22:13:09,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917704771] [2021-06-12 22:13:09,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:13:09,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:09,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:13:09,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:13:09,400 INFO L87 Difference]: Start difference. First operand 5896 states and 17044 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:09,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:09,637 INFO L93 Difference]: Finished difference Result 6556 states and 18704 transitions. [2021-06-12 22:13:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:13:09,637 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:09,645 INFO L225 Difference]: With dead ends: 6556 [2021-06-12 22:13:09,646 INFO L226 Difference]: Without dead ends: 6480 [2021-06-12 22:13:09,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2021-06-12 22:13:09,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 5562. [2021-06-12 22:13:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 5561 states have (on average 2.88563208056105) internal successors, (16047), 5561 states have internal predecessors, (16047), 0 states have call successors, (0), 0 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 22:13:09,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 16047 transitions. [2021-06-12 22:13:09,715 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 16047 transitions. Word has length 34 [2021-06-12 22:13:09,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:09,716 INFO L482 AbstractCegarLoop]: Abstraction has 5562 states and 16047 transitions. [2021-06-12 22:13:09,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:09,716 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 16047 transitions. [2021-06-12 22:13:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:09,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:09,722 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:09,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 22:13:09,923 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash -862511400, now seen corresponding path program 45 times [2021-06-12 22:13:09,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:09,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570582241] [2021-06-12 22:13:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:10,048 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 22:13:10,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:10,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570582241] [2021-06-12 22:13:10,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570582241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:10,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836364469] [2021-06-12 22:13:10,049 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:10,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:13:10,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:10,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:10,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:10,293 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 22:13:10,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836364469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:10,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:10,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:13:10,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361864761] [2021-06-12 22:13:10,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:10,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:10,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:10,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:10,294 INFO L87 Difference]: Start difference. First operand 5562 states and 16047 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:10,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:10,498 INFO L93 Difference]: Finished difference Result 6381 states and 18213 transitions. [2021-06-12 22:13:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:13:10,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:10,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:10,506 INFO L225 Difference]: With dead ends: 6381 [2021-06-12 22:13:10,506 INFO L226 Difference]: Without dead ends: 6305 [2021-06-12 22:13:10,507 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:10,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-06-12 22:13:10,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 5827. [2021-06-12 22:13:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5827 states, 5826 states have (on average 2.8884311706144867) internal successors, (16828), 5826 states have internal predecessors, (16828), 0 states have call successors, (0), 0 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 22:13:10,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5827 states to 5827 states and 16828 transitions. [2021-06-12 22:13:10,572 INFO L78 Accepts]: Start accepts. Automaton has 5827 states and 16828 transitions. Word has length 34 [2021-06-12 22:13:10,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:10,572 INFO L482 AbstractCegarLoop]: Abstraction has 5827 states and 16828 transitions. [2021-06-12 22:13:10,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:10,572 INFO L276 IsEmpty]: Start isEmpty. Operand 5827 states and 16828 transitions. [2021-06-12 22:13:10,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:10,578 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:10,578 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:10,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:10,779 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:10,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:10,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1403446700, now seen corresponding path program 46 times [2021-06-12 22:13:10,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:10,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843909413] [2021-06-12 22:13:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:10,907 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 22:13:10,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:10,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843909413] [2021-06-12 22:13:10,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843909413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:10,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611652632] [2021-06-12 22:13:10,907 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:10,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:10,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:10,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:10,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:11,138 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 22:13:11,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611652632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:11,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:11,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:13:11,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042251612] [2021-06-12 22:13:11,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:13:11,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:11,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:13:11,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:11,140 INFO L87 Difference]: Start difference. First operand 5827 states and 16828 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 22:13:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:11,353 INFO L93 Difference]: Finished difference Result 7509 states and 21608 transitions. [2021-06-12 22:13:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:13:11,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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) Word has length 34 [2021-06-12 22:13:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:11,362 INFO L225 Difference]: With dead ends: 7509 [2021-06-12 22:13:11,362 INFO L226 Difference]: Without dead ends: 7419 [2021-06-12 22:13:11,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:13:11,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7419 states. [2021-06-12 22:13:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7419 to 7227. [2021-06-12 22:13:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7227 states, 7226 states have (on average 2.9022972598948242) internal successors, (20972), 7226 states have internal predecessors, (20972), 0 states have call successors, (0), 0 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 22:13:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7227 states to 7227 states and 20972 transitions. [2021-06-12 22:13:11,462 INFO L78 Accepts]: Start accepts. Automaton has 7227 states and 20972 transitions. Word has length 34 [2021-06-12 22:13:11,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:11,463 INFO L482 AbstractCegarLoop]: Abstraction has 7227 states and 20972 transitions. [2021-06-12 22:13:11,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 22:13:11,463 INFO L276 IsEmpty]: Start isEmpty. Operand 7227 states and 20972 transitions. [2021-06-12 22:13:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:11,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:11,473 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:11,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:11,686 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:11,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:11,686 INFO L82 PathProgramCache]: Analyzing trace with hash 180516264, now seen corresponding path program 47 times [2021-06-12 22:13:11,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:11,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810349626] [2021-06-12 22:13:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:11,775 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 22:13:11,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:11,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810349626] [2021-06-12 22:13:11,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810349626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:11,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577422179] [2021-06-12 22:13:11,775 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:11,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:13:11,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:11,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:11,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:11,963 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 22:13:11,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577422179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:11,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:11,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-12 22:13:11,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438278511] [2021-06-12 22:13:11,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:13:11,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:11,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:13:11,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:13:11,965 INFO L87 Difference]: Start difference. First operand 7227 states and 20972 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 22:13:12,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:12,211 INFO L93 Difference]: Finished difference Result 7681 states and 22109 transitions. [2021-06-12 22:13:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:13:12,211 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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) Word has length 34 [2021-06-12 22:13:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:12,224 INFO L225 Difference]: With dead ends: 7681 [2021-06-12 22:13:12,224 INFO L226 Difference]: Without dead ends: 7573 [2021-06-12 22:13:12,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:12,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7573 states. [2021-06-12 22:13:12,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7573 to 7191. [2021-06-12 22:13:12,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7191 states, 7190 states have (on average 2.9009735744089014) internal successors, (20858), 7190 states have internal predecessors, (20858), 0 states have call successors, (0), 0 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 22:13:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7191 states to 7191 states and 20858 transitions. [2021-06-12 22:13:12,404 INFO L78 Accepts]: Start accepts. Automaton has 7191 states and 20858 transitions. Word has length 34 [2021-06-12 22:13:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:12,404 INFO L482 AbstractCegarLoop]: Abstraction has 7191 states and 20858 transitions. [2021-06-12 22:13:12,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 22:13:12,404 INFO L276 IsEmpty]: Start isEmpty. Operand 7191 states and 20858 transitions. [2021-06-12 22:13:12,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:12,414 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:12,414 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:12,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-12 22:13:12,636 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:12,637 INFO L82 PathProgramCache]: Analyzing trace with hash 576311422, now seen corresponding path program 48 times [2021-06-12 22:13:12,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:12,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073626569] [2021-06-12 22:13:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:12,759 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 22:13:12,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:12,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073626569] [2021-06-12 22:13:12,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073626569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:12,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048846720] [2021-06-12 22:13:12,760 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:12,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:13:12,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:12,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:12,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:12,965 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 22:13:12,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048846720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:12,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:12,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 22:13:12,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346369727] [2021-06-12 22:13:12,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:12,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:12,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:12,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:12,966 INFO L87 Difference]: Start difference. First operand 7191 states and 20858 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 22:13:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:13,169 INFO L93 Difference]: Finished difference Result 8299 states and 23923 transitions. [2021-06-12 22:13:13,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:13:13,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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) Word has length 34 [2021-06-12 22:13:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:13,180 INFO L225 Difference]: With dead ends: 8299 [2021-06-12 22:13:13,180 INFO L226 Difference]: Without dead ends: 8182 [2021-06-12 22:13:13,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8182 states. [2021-06-12 22:13:13,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8182 to 7911. [2021-06-12 22:13:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7911 states, 7910 states have (on average 2.9107458912768647) internal successors, (23024), 7910 states have internal predecessors, (23024), 0 states have call successors, (0), 0 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 22:13:13,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 23024 transitions. [2021-06-12 22:13:13,279 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 23024 transitions. Word has length 34 [2021-06-12 22:13:13,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:13,279 INFO L482 AbstractCegarLoop]: Abstraction has 7911 states and 23024 transitions. [2021-06-12 22:13:13,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 22:13:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 23024 transitions. [2021-06-12 22:13:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:13,288 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:13,288 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:13,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:13,493 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:13,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1774559878, now seen corresponding path program 49 times [2021-06-12 22:13:13,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:13,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108456839] [2021-06-12 22:13:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:13:13,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:13,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108456839] [2021-06-12 22:13:13,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108456839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:13,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037878387] [2021-06-12 22:13:13,582 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:13,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:13,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:13,804 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 22:13:13,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037878387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:13,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:13,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 22:13:13,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171414971] [2021-06-12 22:13:13,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:13,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:13,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:13,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:13,805 INFO L87 Difference]: Start difference. First operand 7911 states and 23024 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 22:13:14,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:14,049 INFO L93 Difference]: Finished difference Result 8695 states and 25141 transitions. [2021-06-12 22:13:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:13:14,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:14,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:14,060 INFO L225 Difference]: With dead ends: 8695 [2021-06-12 22:13:14,061 INFO L226 Difference]: Without dead ends: 8578 [2021-06-12 22:13:14,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:14,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8578 states. [2021-06-12 22:13:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8578 to 8323. [2021-06-12 22:13:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8323 states, 8322 states have (on average 2.918048546022591) internal successors, (24284), 8322 states have internal predecessors, (24284), 0 states have call successors, (0), 0 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 22:13:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8323 states to 8323 states and 24284 transitions. [2021-06-12 22:13:14,165 INFO L78 Accepts]: Start accepts. Automaton has 8323 states and 24284 transitions. Word has length 34 [2021-06-12 22:13:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:14,165 INFO L482 AbstractCegarLoop]: Abstraction has 8323 states and 24284 transitions. [2021-06-12 22:13:14,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 22:13:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 8323 states and 24284 transitions. [2021-06-12 22:13:14,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:14,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:14,174 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:14,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-12 22:13:14,375 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:14,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:14,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1520972218, now seen corresponding path program 50 times [2021-06-12 22:13:14,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:14,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669116692] [2021-06-12 22:13:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:14,493 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 22:13:14,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:14,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669116692] [2021-06-12 22:13:14,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669116692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:14,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368250698] [2021-06-12 22:13:14,493 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:14,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:14,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:14,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:14,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:14,723 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 22:13:14,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368250698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:14,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:14,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:13:14,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781235699] [2021-06-12 22:13:14,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:13:14,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:14,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:13:14,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:14,725 INFO L87 Difference]: Start difference. First operand 8323 states and 24284 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 22:13:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:14,905 INFO L93 Difference]: Finished difference Result 8641 states and 24990 transitions. [2021-06-12 22:13:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:13:14,906 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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) Word has length 34 [2021-06-12 22:13:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:14,916 INFO L225 Difference]: With dead ends: 8641 [2021-06-12 22:13:14,917 INFO L226 Difference]: Without dead ends: 8565 [2021-06-12 22:13:14,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:13:14,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8565 states. [2021-06-12 22:13:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8565 to 8317. [2021-06-12 22:13:15,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8317 states, 8316 states have (on average 2.9183501683501682) internal successors, (24269), 8316 states have internal predecessors, (24269), 0 states have call successors, (0), 0 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 22:13:15,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 24269 transitions. [2021-06-12 22:13:15,047 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 24269 transitions. Word has length 34 [2021-06-12 22:13:15,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:15,047 INFO L482 AbstractCegarLoop]: Abstraction has 8317 states and 24269 transitions. [2021-06-12 22:13:15,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 22:13:15,047 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 24269 transitions. [2021-06-12 22:13:15,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:15,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:15,056 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:15,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:15,256 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:15,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:15,256 INFO L82 PathProgramCache]: Analyzing trace with hash -339756294, now seen corresponding path program 51 times [2021-06-12 22:13:15,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:15,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109626646] [2021-06-12 22:13:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:15,375 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 22:13:15,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:15,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109626646] [2021-06-12 22:13:15,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109626646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:15,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453889699] [2021-06-12 22:13:15,375 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:15,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:13:15,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:15,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:15,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:15,525 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 22:13:15,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453889699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:15,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:15,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 22:13:15,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011630299] [2021-06-12 22:13:15,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:13:15,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:15,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:13:15,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:13:15,526 INFO L87 Difference]: Start difference. First operand 8317 states and 24269 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 22:13:15,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:15,722 INFO L93 Difference]: Finished difference Result 12332 states and 36170 transitions. [2021-06-12 22:13:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:13:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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) Word has length 34 [2021-06-12 22:13:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:15,739 INFO L225 Difference]: With dead ends: 12332 [2021-06-12 22:13:15,739 INFO L226 Difference]: Without dead ends: 12295 [2021-06-12 22:13:15,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:15,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12295 states. [2021-06-12 22:13:15,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12295 to 8325. [2021-06-12 22:13:15,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8325 states, 8324 states have (on average 2.917948101874099) internal successors, (24289), 8324 states have internal predecessors, (24289), 0 states have call successors, (0), 0 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 22:13:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8325 states to 8325 states and 24289 transitions. [2021-06-12 22:13:15,851 INFO L78 Accepts]: Start accepts. Automaton has 8325 states and 24289 transitions. Word has length 34 [2021-06-12 22:13:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:15,851 INFO L482 AbstractCegarLoop]: Abstraction has 8325 states and 24289 transitions. [2021-06-12 22:13:15,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 22:13:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 8325 states and 24289 transitions. [2021-06-12 22:13:15,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:15,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:15,859 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:16,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:16,060 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:16,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:16,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2051845890, now seen corresponding path program 52 times [2021-06-12 22:13:16,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:16,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333371689] [2021-06-12 22:13:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:16,178 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 22:13:16,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:16,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333371689] [2021-06-12 22:13:16,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333371689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:16,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105670232] [2021-06-12 22:13:16,179 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:16,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:16,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:16,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:16,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:16,387 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 22:13:16,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105670232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:16,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:16,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:13:16,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115022388] [2021-06-12 22:13:16,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:13:16,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:16,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:13:16,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:13:16,388 INFO L87 Difference]: Start difference. First operand 8325 states and 24289 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:16,525 INFO L93 Difference]: Finished difference Result 12300 states and 36126 transitions. [2021-06-12 22:13:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:13:16,525 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:16,541 INFO L225 Difference]: With dead ends: 12300 [2021-06-12 22:13:16,541 INFO L226 Difference]: Without dead ends: 12263 [2021-06-12 22:13:16,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:16,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12263 states. [2021-06-12 22:13:16,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12263 to 8347. [2021-06-12 22:13:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8347 states, 8346 states have (on average 2.9180445722501798) internal successors, (24354), 8346 states have internal predecessors, (24354), 0 states have call successors, (0), 0 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 22:13:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 24354 transitions. [2021-06-12 22:13:16,667 INFO L78 Accepts]: Start accepts. Automaton has 8347 states and 24354 transitions. Word has length 34 [2021-06-12 22:13:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:16,668 INFO L482 AbstractCegarLoop]: Abstraction has 8347 states and 24354 transitions. [2021-06-12 22:13:16,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 8347 states and 24354 transitions. [2021-06-12 22:13:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:16,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:16,677 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:16,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:16,879 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:16,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:16,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1363343686, now seen corresponding path program 53 times [2021-06-12 22:13:16,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:16,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548388120] [2021-06-12 22:13:16,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:16,994 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 22:13:16,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:16,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548388120] [2021-06-12 22:13:16,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548388120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:16,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122302350] [2021-06-12 22:13:16,996 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:17,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:13:17,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:17,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:17,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:17,203 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 22:13:17,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122302350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:17,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:17,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:13:17,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131336013] [2021-06-12 22:13:17,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:13:17,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:17,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:13:17,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:13:17,205 INFO L87 Difference]: Start difference. First operand 8347 states and 24354 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:17,425 INFO L93 Difference]: Finished difference Result 12845 states and 37674 transitions. [2021-06-12 22:13:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:13:17,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:17,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:17,480 INFO L225 Difference]: With dead ends: 12845 [2021-06-12 22:13:17,480 INFO L226 Difference]: Without dead ends: 12771 [2021-06-12 22:13:17,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:17,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2021-06-12 22:13:17,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 8781. [2021-06-12 22:13:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8781 states, 8780 states have (on average 2.9197038724373576) internal successors, (25635), 8780 states have internal predecessors, (25635), 0 states have call successors, (0), 0 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 22:13:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8781 states to 8781 states and 25635 transitions. [2021-06-12 22:13:17,623 INFO L78 Accepts]: Start accepts. Automaton has 8781 states and 25635 transitions. Word has length 34 [2021-06-12 22:13:17,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:17,623 INFO L482 AbstractCegarLoop]: Abstraction has 8781 states and 25635 transitions. [2021-06-12 22:13:17,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 8781 states and 25635 transitions. [2021-06-12 22:13:17,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:17,632 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:17,633 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:17,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:17,833 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:17,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:17,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1176620350, now seen corresponding path program 54 times [2021-06-12 22:13:17,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:17,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790153010] [2021-06-12 22:13:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:17,957 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 22:13:17,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:17,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790153010] [2021-06-12 22:13:17,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790153010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177693997] [2021-06-12 22:13:17,958 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:17,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:13:17,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:17,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:13:17,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:18,176 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 22:13:18,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177693997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:18,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:18,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 22:13:18,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400869221] [2021-06-12 22:13:18,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:13:18,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:18,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:13:18,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:13:18,177 INFO L87 Difference]: Start difference. First operand 8781 states and 25635 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:13:18,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:18,856 INFO L93 Difference]: Finished difference Result 14288 states and 41566 transitions. [2021-06-12 22:13:18,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:13:18,856 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:18,876 INFO L225 Difference]: With dead ends: 14288 [2021-06-12 22:13:18,876 INFO L226 Difference]: Without dead ends: 14180 [2021-06-12 22:13:18,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 549.3ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:13:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14180 states. [2021-06-12 22:13:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14180 to 9669. [2021-06-12 22:13:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9669 states, 9668 states have (on average 2.929354571783202) internal successors, (28321), 9668 states have internal predecessors, (28321), 0 states have call successors, (0), 0 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 22:13:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9669 states to 9669 states and 28321 transitions. [2021-06-12 22:13:19,076 INFO L78 Accepts]: Start accepts. Automaton has 9669 states and 28321 transitions. Word has length 34 [2021-06-12 22:13:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:19,077 INFO L482 AbstractCegarLoop]: Abstraction has 9669 states and 28321 transitions. [2021-06-12 22:13:19,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:13:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 9669 states and 28321 transitions. [2021-06-12 22:13:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:19,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:19,088 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:19,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-12 22:13:19,289 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:19,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:19,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1063331952, now seen corresponding path program 55 times [2021-06-12 22:13:19,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:19,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761824224] [2021-06-12 22:13:19,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:19,426 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 22:13:19,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:19,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761824224] [2021-06-12 22:13:19,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761824224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:19,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291998164] [2021-06-12 22:13:19,426 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:19,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:19,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:19,632 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 22:13:19,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291998164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:19,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:19,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:13:19,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889910242] [2021-06-12 22:13:19,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:19,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:19,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:19,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:19,634 INFO L87 Difference]: Start difference. First operand 9669 states and 28321 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:19,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:19,830 INFO L93 Difference]: Finished difference Result 10725 states and 31154 transitions. [2021-06-12 22:13:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:13:19,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:19,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:19,844 INFO L225 Difference]: With dead ends: 10725 [2021-06-12 22:13:19,844 INFO L226 Difference]: Without dead ends: 10651 [2021-06-12 22:13:19,845 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:19,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10651 states. [2021-06-12 22:13:19,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10651 to 10003. [2021-06-12 22:13:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10003 states, 10002 states have (on average 2.931613677264547) internal successors, (29322), 10002 states have internal predecessors, (29322), 0 states have call successors, (0), 0 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 22:13:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10003 states to 10003 states and 29322 transitions. [2021-06-12 22:13:19,978 INFO L78 Accepts]: Start accepts. Automaton has 10003 states and 29322 transitions. Word has length 34 [2021-06-12 22:13:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:19,978 INFO L482 AbstractCegarLoop]: Abstraction has 10003 states and 29322 transitions. [2021-06-12 22:13:19,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 10003 states and 29322 transitions. [2021-06-12 22:13:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:19,990 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:19,990 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:20,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:20,193 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:20,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:20,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1983656864, now seen corresponding path program 56 times [2021-06-12 22:13:20,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:20,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896200806] [2021-06-12 22:13:20,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:20,299 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 22:13:20,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:20,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896200806] [2021-06-12 22:13:20,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896200806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:20,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892450231] [2021-06-12 22:13:20,300 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:20,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:20,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:20,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:20,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:20,477 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 22:13:20,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892450231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:20,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:20,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 22:13:20,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694010356] [2021-06-12 22:13:20,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:13:20,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:20,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:13:20,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:13:20,479 INFO L87 Difference]: Start difference. First operand 10003 states and 29322 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:20,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:20,678 INFO L93 Difference]: Finished difference Result 10805 states and 31382 transitions. [2021-06-12 22:13:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:13:20,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:20,692 INFO L225 Difference]: With dead ends: 10805 [2021-06-12 22:13:20,692 INFO L226 Difference]: Without dead ends: 10731 [2021-06-12 22:13:20,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:20,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10731 states. [2021-06-12 22:13:20,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10731 to 9581. [2021-06-12 22:13:20,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9581 states, 9580 states have (on average 2.9305845511482254) internal successors, (28075), 9580 states have internal predecessors, (28075), 0 states have call successors, (0), 0 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 22:13:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 28075 transitions. [2021-06-12 22:13:20,851 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 28075 transitions. Word has length 34 [2021-06-12 22:13:20,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:20,851 INFO L482 AbstractCegarLoop]: Abstraction has 9581 states and 28075 transitions. [2021-06-12 22:13:20,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:20,851 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 28075 transitions. [2021-06-12 22:13:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:20,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:20,862 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:21,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:21,062 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:21,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1691006202, now seen corresponding path program 57 times [2021-06-12 22:13:21,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:21,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905959724] [2021-06-12 22:13:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:21,148 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 22:13:21,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:21,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905959724] [2021-06-12 22:13:21,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905959724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:21,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30361543] [2021-06-12 22:13:21,149 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:21,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:13:21,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:21,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:21,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:21,330 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 22:13:21,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30361543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:21,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:21,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 22:13:21,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393366919] [2021-06-12 22:13:21,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:13:21,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:21,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:13:21,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:13:21,331 INFO L87 Difference]: Start difference. First operand 9581 states and 28075 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:21,572 INFO L93 Difference]: Finished difference Result 11489 states and 33477 transitions. [2021-06-12 22:13:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:13:21,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:21,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:21,587 INFO L225 Difference]: With dead ends: 11489 [2021-06-12 22:13:21,587 INFO L226 Difference]: Without dead ends: 11399 [2021-06-12 22:13:21,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:13:21,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2021-06-12 22:13:21,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 10345. [2021-06-12 22:13:21,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10345 states, 10344 states have (on average 2.93899845320959) internal successors, (30401), 10344 states have internal predecessors, (30401), 0 states have call successors, (0), 0 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 22:13:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10345 states to 10345 states and 30401 transitions. [2021-06-12 22:13:21,721 INFO L78 Accepts]: Start accepts. Automaton has 10345 states and 30401 transitions. Word has length 34 [2021-06-12 22:13:21,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:21,721 INFO L482 AbstractCegarLoop]: Abstraction has 10345 states and 30401 transitions. [2021-06-12 22:13:21,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:21,721 INFO L276 IsEmpty]: Start isEmpty. Operand 10345 states and 30401 transitions. [2021-06-12 22:13:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:21,733 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:21,733 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:21,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:21,934 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:21,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:21,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1810089214, now seen corresponding path program 58 times [2021-06-12 22:13:21,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:21,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659073437] [2021-06-12 22:13:21,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:13:22,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:22,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659073437] [2021-06-12 22:13:22,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659073437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:22,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920996006] [2021-06-12 22:13:22,029 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:22,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:22,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:22,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:22,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:22,252 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 22:13:22,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920996006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:22,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:22,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 22:13:22,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321980171] [2021-06-12 22:13:22,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:13:22,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:22,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:13:22,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:13:22,253 INFO L87 Difference]: Start difference. First operand 10345 states and 30401 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:13:22,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:22,496 INFO L93 Difference]: Finished difference Result 11481 states and 33447 transitions. [2021-06-12 22:13:22,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:13:22,497 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:22,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:22,511 INFO L225 Difference]: With dead ends: 11481 [2021-06-12 22:13:22,511 INFO L226 Difference]: Without dead ends: 11365 [2021-06-12 22:13:22,512 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:13:22,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11365 states. [2021-06-12 22:13:22,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11365 to 10339. [2021-06-12 22:13:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10339 states, 10338 states have (on average 2.9367382472431807) internal successors, (30360), 10338 states have internal predecessors, (30360), 0 states have call successors, (0), 0 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 22:13:22,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10339 states to 10339 states and 30360 transitions. [2021-06-12 22:13:22,653 INFO L78 Accepts]: Start accepts. Automaton has 10339 states and 30360 transitions. Word has length 34 [2021-06-12 22:13:22,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:22,654 INFO L482 AbstractCegarLoop]: Abstraction has 10339 states and 30360 transitions. [2021-06-12 22:13:22,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:13:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 10339 states and 30360 transitions. [2021-06-12 22:13:22,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:22,665 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:22,665 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:22,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-12 22:13:22,866 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:22,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:22,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1665801632, now seen corresponding path program 59 times [2021-06-12 22:13:22,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:22,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43649523] [2021-06-12 22:13:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:22,964 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 22:13:22,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:22,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43649523] [2021-06-12 22:13:22,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43649523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:22,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580124781] [2021-06-12 22:13:22,964 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:22,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:13:22,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:22,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:22,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:23,133 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 22:13:23,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580124781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:23,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:23,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:13:23,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350478552] [2021-06-12 22:13:23,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:23,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:23,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:23,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:23,134 INFO L87 Difference]: Start difference. First operand 10339 states and 30360 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:23,423 INFO L93 Difference]: Finished difference Result 11183 states and 32491 transitions. [2021-06-12 22:13:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:13:23,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:23,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:23,437 INFO L225 Difference]: With dead ends: 11183 [2021-06-12 22:13:23,437 INFO L226 Difference]: Without dead ends: 11066 [2021-06-12 22:13:23,438 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:13:23,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11066 states. [2021-06-12 22:13:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11066 to 9849. [2021-06-12 22:13:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9849 states, 9848 states have (on average 2.933489033306255) internal successors, (28889), 9848 states have internal predecessors, (28889), 0 states have call successors, (0), 0 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 22:13:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 28889 transitions. [2021-06-12 22:13:23,611 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 28889 transitions. Word has length 34 [2021-06-12 22:13:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:23,612 INFO L482 AbstractCegarLoop]: Abstraction has 9849 states and 28889 transitions. [2021-06-12 22:13:23,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:23,612 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 28889 transitions. [2021-06-12 22:13:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:23,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:23,622 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:23,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:23,823 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:23,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:23,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1957855712, now seen corresponding path program 60 times [2021-06-12 22:13:23,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:23,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72052421] [2021-06-12 22:13:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:23,953 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 22:13:23,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:23,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72052421] [2021-06-12 22:13:23,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72052421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:23,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503161558] [2021-06-12 22:13:23,954 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:23,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:13:23,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:23,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:23,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:24,186 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 22:13:24,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503161558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:24,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:24,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:13:24,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314339261] [2021-06-12 22:13:24,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:13:24,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:24,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:13:24,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:24,188 INFO L87 Difference]: Start difference. First operand 9849 states and 28889 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 22:13:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:24,467 INFO L93 Difference]: Finished difference Result 11201 states and 32696 transitions. [2021-06-12 22:13:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:13:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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) Word has length 34 [2021-06-12 22:13:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:24,482 INFO L225 Difference]: With dead ends: 11201 [2021-06-12 22:13:24,482 INFO L226 Difference]: Without dead ends: 11107 [2021-06-12 22:13:24,483 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:13:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11107 states. [2021-06-12 22:13:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11107 to 10839. [2021-06-12 22:13:24,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10839 states, 10838 states have (on average 2.9409485144860676) internal successors, (31874), 10838 states have internal predecessors, (31874), 0 states have call successors, (0), 0 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 22:13:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10839 states to 10839 states and 31874 transitions. [2021-06-12 22:13:24,638 INFO L78 Accepts]: Start accepts. Automaton has 10839 states and 31874 transitions. Word has length 34 [2021-06-12 22:13:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:24,638 INFO L482 AbstractCegarLoop]: Abstraction has 10839 states and 31874 transitions. [2021-06-12 22:13:24,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 22:13:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 10839 states and 31874 transitions. [2021-06-12 22:13:24,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:24,650 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:24,650 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:24,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-12 22:13:24,850 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:24,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:24,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1517139066, now seen corresponding path program 61 times [2021-06-12 22:13:24,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:24,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14974726] [2021-06-12 22:13:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:24,950 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 22:13:24,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:24,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14974726] [2021-06-12 22:13:24,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14974726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:24,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592816599] [2021-06-12 22:13:24,950 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:24,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:24,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:25,134 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 22:13:25,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592816599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:25,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:25,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 22:13:25,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163084642] [2021-06-12 22:13:25,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:25,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:25,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:25,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:25,135 INFO L87 Difference]: Start difference. First operand 10839 states and 31874 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 22:13:25,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:25,366 INFO L93 Difference]: Finished difference Result 11645 states and 34056 transitions. [2021-06-12 22:13:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:13:25,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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) Word has length 34 [2021-06-12 22:13:25,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:25,381 INFO L225 Difference]: With dead ends: 11645 [2021-06-12 22:13:25,382 INFO L226 Difference]: Without dead ends: 11537 [2021-06-12 22:13:25,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:25,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11537 states. [2021-06-12 22:13:25,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11537 to 10493. [2021-06-12 22:13:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10493 states, 10492 states have (on average 2.9400495615707207) internal successors, (30847), 10492 states have internal predecessors, (30847), 0 states have call successors, (0), 0 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 22:13:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10493 states to 10493 states and 30847 transitions. [2021-06-12 22:13:25,564 INFO L78 Accepts]: Start accepts. Automaton has 10493 states and 30847 transitions. Word has length 34 [2021-06-12 22:13:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:25,564 INFO L482 AbstractCegarLoop]: Abstraction has 10493 states and 30847 transitions. [2021-06-12 22:13:25,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 22:13:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 10493 states and 30847 transitions. [2021-06-12 22:13:25,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:25,575 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:25,575 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:25,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 22:13:25,775 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:25,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1039269088, now seen corresponding path program 62 times [2021-06-12 22:13:25,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:25,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223463729] [2021-06-12 22:13:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:25,851 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 22:13:25,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:25,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223463729] [2021-06-12 22:13:25,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223463729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:25,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119703879] [2021-06-12 22:13:25,851 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:25,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:25,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:25,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:25,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:26,036 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 22:13:26,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119703879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:26,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:26,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-12 22:13:26,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689454137] [2021-06-12 22:13:26,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:13:26,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:26,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:13:26,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:13:26,037 INFO L87 Difference]: Start difference. First operand 10493 states and 30847 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 22:13:26,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:26,209 INFO L93 Difference]: Finished difference Result 12117 states and 35549 transitions. [2021-06-12 22:13:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:13:26,209 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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) Word has length 34 [2021-06-12 22:13:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:26,225 INFO L225 Difference]: With dead ends: 12117 [2021-06-12 22:13:26,226 INFO L226 Difference]: Without dead ends: 12035 [2021-06-12 22:13:26,226 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12035 states. [2021-06-12 22:13:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12035 to 11671. [2021-06-12 22:13:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11671 states, 11670 states have (on average 2.948928877463582) internal successors, (34414), 11670 states have internal predecessors, (34414), 0 states have call successors, (0), 0 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 22:13:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11671 states to 11671 states and 34414 transitions. [2021-06-12 22:13:26,385 INFO L78 Accepts]: Start accepts. Automaton has 11671 states and 34414 transitions. Word has length 34 [2021-06-12 22:13:26,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:26,385 INFO L482 AbstractCegarLoop]: Abstraction has 11671 states and 34414 transitions. [2021-06-12 22:13:26,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 22:13:26,385 INFO L276 IsEmpty]: Start isEmpty. Operand 11671 states and 34414 transitions. [2021-06-12 22:13:26,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:26,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:26,399 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:26,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-12 22:13:26,600 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:26,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1158352100, now seen corresponding path program 63 times [2021-06-12 22:13:26,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:26,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254356324] [2021-06-12 22:13:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:13:26,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:26,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254356324] [2021-06-12 22:13:26,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254356324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:26,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972573683] [2021-06-12 22:13:26,679 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:26,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:13:26,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:26,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:26,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:26,863 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 22:13:26,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972573683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:26,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:26,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-12 22:13:26,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314708163] [2021-06-12 22:13:26,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:13:26,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:26,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:13:26,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:13:26,864 INFO L87 Difference]: Start difference. First operand 11671 states and 34414 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 22:13:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:27,040 INFO L93 Difference]: Finished difference Result 12114 states and 35537 transitions. [2021-06-12 22:13:27,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:13:27,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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) Word has length 34 [2021-06-12 22:13:27,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:27,056 INFO L225 Difference]: With dead ends: 12114 [2021-06-12 22:13:27,056 INFO L226 Difference]: Without dead ends: 12002 [2021-06-12 22:13:27,056 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:27,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-06-12 22:13:27,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 11231. [2021-06-12 22:13:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11231 states, 11230 states have (on average 2.943900267141585) internal successors, (33060), 11230 states have internal predecessors, (33060), 0 states have call successors, (0), 0 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 22:13:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11231 states to 11231 states and 33060 transitions. [2021-06-12 22:13:27,248 INFO L78 Accepts]: Start accepts. Automaton has 11231 states and 33060 transitions. Word has length 34 [2021-06-12 22:13:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:27,248 INFO L482 AbstractCegarLoop]: Abstraction has 11231 states and 33060 transitions. [2021-06-12 22:13:27,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 22:13:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 11231 states and 33060 transitions. [2021-06-12 22:13:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:27,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:27,262 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:27,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:27,465 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:27,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:27,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1014064518, now seen corresponding path program 64 times [2021-06-12 22:13:27,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:27,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201690348] [2021-06-12 22:13:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:13:27,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:27,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201690348] [2021-06-12 22:13:27,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201690348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:27,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668902353] [2021-06-12 22:13:27,563 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:27,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:27,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:27,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:27,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:27,786 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 22:13:27,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668902353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:27,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:27,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 22:13:27,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808028569] [2021-06-12 22:13:27,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:27,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:27,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:27,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:27,787 INFO L87 Difference]: Start difference. First operand 11231 states and 33060 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 22:13:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:28,031 INFO L93 Difference]: Finished difference Result 12011 states and 35167 transitions. [2021-06-12 22:13:28,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:13:28,031 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 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 34 [2021-06-12 22:13:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:28,047 INFO L225 Difference]: With dead ends: 12011 [2021-06-12 22:13:28,047 INFO L226 Difference]: Without dead ends: 11894 [2021-06-12 22:13:28,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:28,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11894 states. [2021-06-12 22:13:28,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11894 to 11643. [2021-06-12 22:13:28,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11643 states, 11642 states have (on average 2.9479470881291876) internal successors, (34320), 11642 states have internal predecessors, (34320), 0 states have call successors, (0), 0 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 22:13:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11643 states to 11643 states and 34320 transitions. [2021-06-12 22:13:28,204 INFO L78 Accepts]: Start accepts. Automaton has 11643 states and 34320 transitions. Word has length 34 [2021-06-12 22:13:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:28,204 INFO L482 AbstractCegarLoop]: Abstraction has 11643 states and 34320 transitions. [2021-06-12 22:13:28,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 22:13:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 11643 states and 34320 transitions. [2021-06-12 22:13:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 22:13:28,217 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:28,217 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:28,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:28,418 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:28,418 INFO L82 PathProgramCache]: Analyzing trace with hash -14629318, now seen corresponding path program 65 times [2021-06-12 22:13:28,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:28,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920391898] [2021-06-12 22:13:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:28,528 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 22:13:28,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:28,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920391898] [2021-06-12 22:13:28,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920391898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:28,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363633142] [2021-06-12 22:13:28,528 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:28,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:13:28,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:28,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:13:28,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:28,721 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 22:13:28,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363633142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:28,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:28,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:13:28,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828933284] [2021-06-12 22:13:28,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:13:28,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:28,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:13:28,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:28,722 INFO L87 Difference]: Start difference. First operand 11643 states and 34320 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 22:13:28,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:28,966 INFO L93 Difference]: Finished difference Result 11957 states and 35016 transitions. [2021-06-12 22:13:28,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:13:28,967 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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) Word has length 34 [2021-06-12 22:13:28,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:28,983 INFO L225 Difference]: With dead ends: 11957 [2021-06-12 22:13:28,983 INFO L226 Difference]: Without dead ends: 11881 [2021-06-12 22:13:28,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:13:28,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2021-06-12 22:13:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 10363. [2021-06-12 22:13:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 10362 states have (on average 2.945377340281799) internal successors, (30520), 10362 states have internal predecessors, (30520), 0 states have call successors, (0), 0 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 22:13:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 30520 transitions. [2021-06-12 22:13:29,172 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 30520 transitions. Word has length 34 [2021-06-12 22:13:29,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:29,172 INFO L482 AbstractCegarLoop]: Abstraction has 10363 states and 30520 transitions. [2021-06-12 22:13:29,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 22:13:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 30520 transitions. [2021-06-12 22:13:29,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:29,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:29,184 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:29,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:29,384 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:29,385 INFO L82 PathProgramCache]: Analyzing trace with hash -826580692, now seen corresponding path program 66 times [2021-06-12 22:13:29,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:29,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977499361] [2021-06-12 22:13:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:29,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:29,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977499361] [2021-06-12 22:13:29,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977499361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:29,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124464272] [2021-06-12 22:13:29,420 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:29,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:13:29,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:29,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:29,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:29,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124464272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:29,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:29,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:13:29,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103571832] [2021-06-12 22:13:29,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:13:29,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:29,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:13:29,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:13:29,531 INFO L87 Difference]: Start difference. First operand 10363 states and 30520 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 22:13:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:29,707 INFO L93 Difference]: Finished difference Result 14684 states and 43273 transitions. [2021-06-12 22:13:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:13:29,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:29,729 INFO L225 Difference]: With dead ends: 14684 [2021-06-12 22:13:29,729 INFO L226 Difference]: Without dead ends: 14684 [2021-06-12 22:13:29,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:29,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14684 states. [2021-06-12 22:13:29,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14684 to 10709. [2021-06-12 22:13:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10709 states, 10708 states have (on average 2.941912588718715) internal successors, (31502), 10708 states have internal predecessors, (31502), 0 states have call successors, (0), 0 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 22:13:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10709 states to 10709 states and 31502 transitions. [2021-06-12 22:13:29,891 INFO L78 Accepts]: Start accepts. Automaton has 10709 states and 31502 transitions. Word has length 37 [2021-06-12 22:13:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:29,891 INFO L482 AbstractCegarLoop]: Abstraction has 10709 states and 31502 transitions. [2021-06-12 22:13:29,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 22:13:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 10709 states and 31502 transitions. [2021-06-12 22:13:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:29,903 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:29,903 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:30,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 22:13:30,104 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:30,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:30,104 INFO L82 PathProgramCache]: Analyzing trace with hash -179080118, now seen corresponding path program 67 times [2021-06-12 22:13:30,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:30,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191806996] [2021-06-12 22:13:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:30,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:30,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191806996] [2021-06-12 22:13:30,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191806996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:30,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880988397] [2021-06-12 22:13:30,134 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:30,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:30,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:30,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880988397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:30,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:30,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:13:30,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696319693] [2021-06-12 22:13:30,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:13:30,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:30,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:13:30,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:13:30,242 INFO L87 Difference]: Start difference. First operand 10709 states and 31502 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 22:13:30,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:30,420 INFO L93 Difference]: Finished difference Result 17639 states and 51455 transitions. [2021-06-12 22:13:30,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:13:30,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:30,454 INFO L225 Difference]: With dead ends: 17639 [2021-06-12 22:13:30,454 INFO L226 Difference]: Without dead ends: 17573 [2021-06-12 22:13:30,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:30,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17573 states. [2021-06-12 22:13:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17573 to 10709. [2021-06-12 22:13:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10709 states, 10708 states have (on average 2.941072095629436) internal successors, (31493), 10708 states have internal predecessors, (31493), 0 states have call successors, (0), 0 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 22:13:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10709 states to 10709 states and 31493 transitions. [2021-06-12 22:13:30,731 INFO L78 Accepts]: Start accepts. Automaton has 10709 states and 31493 transitions. Word has length 37 [2021-06-12 22:13:30,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:30,731 INFO L482 AbstractCegarLoop]: Abstraction has 10709 states and 31493 transitions. [2021-06-12 22:13:30,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 22:13:30,732 INFO L276 IsEmpty]: Start isEmpty. Operand 10709 states and 31493 transitions. [2021-06-12 22:13:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:30,745 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:30,745 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:30,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 22:13:30,945 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:30,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:30,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1381181770, now seen corresponding path program 68 times [2021-06-12 22:13:30,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:30,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672185730] [2021-06-12 22:13:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:30,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:30,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672185730] [2021-06-12 22:13:30,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672185730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:30,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550392799] [2021-06-12 22:13:30,979 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:31,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:31,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:31,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:31,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:31,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550392799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:31,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:31,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:13:31,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892731733] [2021-06-12 22:13:31,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:31,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:31,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:31,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:31,102 INFO L87 Difference]: Start difference. First operand 10709 states and 31493 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:31,639 INFO L93 Difference]: Finished difference Result 22210 states and 64100 transitions. [2021-06-12 22:13:31,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:13:31,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:31,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:31,670 INFO L225 Difference]: With dead ends: 22210 [2021-06-12 22:13:31,671 INFO L226 Difference]: Without dead ends: 22204 [2021-06-12 22:13:31,671 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 359.8ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:13:31,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22204 states. [2021-06-12 22:13:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22204 to 14316. [2021-06-12 22:13:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14316 states, 14315 states have (on average 2.958435207823961) internal successors, (42350), 14315 states have internal predecessors, (42350), 0 states have call successors, (0), 0 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 22:13:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14316 states to 14316 states and 42350 transitions. [2021-06-12 22:13:31,961 INFO L78 Accepts]: Start accepts. Automaton has 14316 states and 42350 transitions. Word has length 37 [2021-06-12 22:13:31,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:31,962 INFO L482 AbstractCegarLoop]: Abstraction has 14316 states and 42350 transitions. [2021-06-12 22:13:31,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 14316 states and 42350 transitions. [2021-06-12 22:13:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:31,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:31,981 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:32,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-12 22:13:32,182 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:32,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:32,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1170484724, now seen corresponding path program 69 times [2021-06-12 22:13:32,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:32,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740065823] [2021-06-12 22:13:32,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:32,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:32,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740065823] [2021-06-12 22:13:32,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740065823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:32,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717832950] [2021-06-12 22:13:32,214 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:32,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:13:32,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:32,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:32,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:32,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717832950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:32,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:32,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:13:32,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512794084] [2021-06-12 22:13:32,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:32,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:32,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:32,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:32,316 INFO L87 Difference]: Start difference. First operand 14316 states and 42350 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:32,686 INFO L93 Difference]: Finished difference Result 18669 states and 54267 transitions. [2021-06-12 22:13:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:13:32,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:32,713 INFO L225 Difference]: With dead ends: 18669 [2021-06-12 22:13:32,713 INFO L226 Difference]: Without dead ends: 18657 [2021-06-12 22:13:32,714 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 218.4ms TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:13:32,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18657 states. [2021-06-12 22:13:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18657 to 15376. [2021-06-12 22:13:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15376 states, 15375 states have (on average 2.9668943089430893) internal successors, (45616), 15375 states have internal predecessors, (45616), 0 states have call successors, (0), 0 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 22:13:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15376 states to 15376 states and 45616 transitions. [2021-06-12 22:13:33,009 INFO L78 Accepts]: Start accepts. Automaton has 15376 states and 45616 transitions. Word has length 37 [2021-06-12 22:13:33,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:33,009 INFO L482 AbstractCegarLoop]: Abstraction has 15376 states and 45616 transitions. [2021-06-12 22:13:33,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:33,009 INFO L276 IsEmpty]: Start isEmpty. Operand 15376 states and 45616 transitions. [2021-06-12 22:13:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:33,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:33,027 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:33,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:33,228 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:33,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:33,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1899236542, now seen corresponding path program 70 times [2021-06-12 22:13:33,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:33,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68702929] [2021-06-12 22:13:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:33,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:33,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68702929] [2021-06-12 22:13:33,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68702929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:33,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229603342] [2021-06-12 22:13:33,265 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:33,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:33,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:33,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:33,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:33,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229603342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:33,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:33,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:13:33,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369752117] [2021-06-12 22:13:33,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:33,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:33,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:33,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:33,410 INFO L87 Difference]: Start difference. First operand 15376 states and 45616 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 22:13:33,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:33,901 INFO L93 Difference]: Finished difference Result 19128 states and 55390 transitions. [2021-06-12 22:13:33,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:13:33,901 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) Word has length 37 [2021-06-12 22:13:33,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:33,927 INFO L225 Difference]: With dead ends: 19128 [2021-06-12 22:13:33,927 INFO L226 Difference]: Without dead ends: 19128 [2021-06-12 22:13:33,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:13:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19128 states. [2021-06-12 22:13:34,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19128 to 13924. [2021-06-12 22:13:34,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13924 states, 13923 states have (on average 2.95970695970696) internal successors, (41208), 13923 states have internal predecessors, (41208), 0 states have call successors, (0), 0 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 22:13:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13924 states to 13924 states and 41208 transitions. [2021-06-12 22:13:34,163 INFO L78 Accepts]: Start accepts. Automaton has 13924 states and 41208 transitions. Word has length 37 [2021-06-12 22:13:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:34,164 INFO L482 AbstractCegarLoop]: Abstraction has 13924 states and 41208 transitions. [2021-06-12 22:13:34,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 22:13:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 13924 states and 41208 transitions. [2021-06-12 22:13:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:34,180 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:34,180 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:34,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-12 22:13:34,381 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:34,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:34,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1522265388, now seen corresponding path program 71 times [2021-06-12 22:13:34,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:34,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71429328] [2021-06-12 22:13:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:34,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:34,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71429328] [2021-06-12 22:13:34,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71429328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:34,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803917895] [2021-06-12 22:13:34,417 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:34,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:13:34,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:34,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:34,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:34,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803917895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:34,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:34,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:13:34,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905495767] [2021-06-12 22:13:34,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:34,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:34,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:34,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:34,557 INFO L87 Difference]: Start difference. First operand 13924 states and 41208 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 22:13:34,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:34,972 INFO L93 Difference]: Finished difference Result 21416 states and 61999 transitions. [2021-06-12 22:13:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:13:34,972 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) Word has length 37 [2021-06-12 22:13:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:35,001 INFO L225 Difference]: With dead ends: 21416 [2021-06-12 22:13:35,001 INFO L226 Difference]: Without dead ends: 21402 [2021-06-12 22:13:35,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:13:35,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21402 states. [2021-06-12 22:13:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21402 to 12522. [2021-06-12 22:13:35,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12522 states, 12521 states have (on average 2.9471288235763917) internal successors, (36901), 12521 states have internal predecessors, (36901), 0 states have call successors, (0), 0 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 22:13:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12522 states to 12522 states and 36901 transitions. [2021-06-12 22:13:35,263 INFO L78 Accepts]: Start accepts. Automaton has 12522 states and 36901 transitions. Word has length 37 [2021-06-12 22:13:35,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:35,263 INFO L482 AbstractCegarLoop]: Abstraction has 12522 states and 36901 transitions. [2021-06-12 22:13:35,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 22:13:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand 12522 states and 36901 transitions. [2021-06-12 22:13:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:35,279 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:35,279 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:35,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:35,482 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:35,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:35,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1606664162, now seen corresponding path program 72 times [2021-06-12 22:13:35,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:35,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459707899] [2021-06-12 22:13:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:35,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:35,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459707899] [2021-06-12 22:13:35,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459707899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:35,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575913544] [2021-06-12 22:13:35,524 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:35,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:13:35,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:35,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:35,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:35,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575913544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:35,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:35,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:13:35,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115068945] [2021-06-12 22:13:35,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:35,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:35,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:35,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:35,633 INFO L87 Difference]: Start difference. First operand 12522 states and 36901 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 22:13:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:36,004 INFO L93 Difference]: Finished difference Result 21217 states and 61477 transitions. [2021-06-12 22:13:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:13:36,005 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) Word has length 37 [2021-06-12 22:13:36,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:36,034 INFO L225 Difference]: With dead ends: 21217 [2021-06-12 22:13:36,034 INFO L226 Difference]: Without dead ends: 21161 [2021-06-12 22:13:36,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:13:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21161 states. [2021-06-12 22:13:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21161 to 13076. [2021-06-12 22:13:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13076 states, 13075 states have (on average 2.944244741873805) internal successors, (38496), 13075 states have internal predecessors, (38496), 0 states have call successors, (0), 0 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 22:13:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13076 states to 13076 states and 38496 transitions. [2021-06-12 22:13:36,315 INFO L78 Accepts]: Start accepts. Automaton has 13076 states and 38496 transitions. Word has length 37 [2021-06-12 22:13:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:36,315 INFO L482 AbstractCegarLoop]: Abstraction has 13076 states and 38496 transitions. [2021-06-12 22:13:36,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 22:13:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 13076 states and 38496 transitions. [2021-06-12 22:13:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:36,333 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:36,333 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:36,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-12 22:13:36,533 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:36,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:36,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1048265624, now seen corresponding path program 73 times [2021-06-12 22:13:36,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:36,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780445071] [2021-06-12 22:13:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:36,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:36,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780445071] [2021-06-12 22:13:36,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780445071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:36,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888283139] [2021-06-12 22:13:36,636 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:36,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:36,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:36,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888283139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:36,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:36,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:13:36,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824997210] [2021-06-12 22:13:36,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:36,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:36,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:36,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:36,747 INFO L87 Difference]: Start difference. First operand 13076 states and 38496 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 22:13:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:37,054 INFO L93 Difference]: Finished difference Result 19540 states and 56766 transitions. [2021-06-12 22:13:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:13:37,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) Word has length 37 [2021-06-12 22:13:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:37,092 INFO L225 Difference]: With dead ends: 19540 [2021-06-12 22:13:37,093 INFO L226 Difference]: Without dead ends: 19491 [2021-06-12 22:13:37,093 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:13:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19491 states. [2021-06-12 22:13:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19491 to 13090. [2021-06-12 22:13:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13090 states, 13089 states have (on average 2.9416303766521508) internal successors, (38503), 13089 states have internal predecessors, (38503), 0 states have call successors, (0), 0 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 22:13:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13090 states to 13090 states and 38503 transitions. [2021-06-12 22:13:37,389 INFO L78 Accepts]: Start accepts. Automaton has 13090 states and 38503 transitions. Word has length 37 [2021-06-12 22:13:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:37,389 INFO L482 AbstractCegarLoop]: Abstraction has 13090 states and 38503 transitions. [2021-06-12 22:13:37,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 22:13:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 13090 states and 38503 transitions. [2021-06-12 22:13:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:37,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:37,405 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:37,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-12 22:13:37,606 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:37,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:37,606 INFO L82 PathProgramCache]: Analyzing trace with hash -272513428, now seen corresponding path program 74 times [2021-06-12 22:13:37,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:37,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317978093] [2021-06-12 22:13:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:37,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:37,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317978093] [2021-06-12 22:13:37,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317978093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:37,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014523348] [2021-06-12 22:13:37,638 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:37,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:37,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:37,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:37,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:37,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014523348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:37,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:37,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:13:37,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724578172] [2021-06-12 22:13:37,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:13:37,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:37,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:13:37,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:13:37,749 INFO L87 Difference]: Start difference. First operand 13090 states and 38503 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 22:13:38,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:38,187 INFO L93 Difference]: Finished difference Result 18207 states and 52420 transitions. [2021-06-12 22:13:38,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:13:38,188 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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) Word has length 37 [2021-06-12 22:13:38,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:38,213 INFO L225 Difference]: With dead ends: 18207 [2021-06-12 22:13:38,213 INFO L226 Difference]: Without dead ends: 18147 [2021-06-12 22:13:38,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:13:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18147 states. [2021-06-12 22:13:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18147 to 13262. [2021-06-12 22:13:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13262 states, 13261 states have (on average 2.932584269662921) internal successors, (38889), 13261 states have internal predecessors, (38889), 0 states have call successors, (0), 0 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 22:13:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13262 states to 13262 states and 38889 transitions. [2021-06-12 22:13:38,536 INFO L78 Accepts]: Start accepts. Automaton has 13262 states and 38889 transitions. Word has length 37 [2021-06-12 22:13:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:38,536 INFO L482 AbstractCegarLoop]: Abstraction has 13262 states and 38889 transitions. [2021-06-12 22:13:38,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 22:13:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 13262 states and 38889 transitions. [2021-06-12 22:13:38,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:38,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:38,551 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:38,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:38,752 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:38,752 INFO L82 PathProgramCache]: Analyzing trace with hash 144146212, now seen corresponding path program 75 times [2021-06-12 22:13:38,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:38,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41493270] [2021-06-12 22:13:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:38,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:38,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41493270] [2021-06-12 22:13:38,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41493270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:38,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247492510] [2021-06-12 22:13:38,782 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:38,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:13:38,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:38,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:38,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:38,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247492510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:38,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:38,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:13:38,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886119364] [2021-06-12 22:13:38,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:38,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:38,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:38,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:38,920 INFO L87 Difference]: Start difference. First operand 13262 states and 38889 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:13:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:39,408 INFO L93 Difference]: Finished difference Result 18702 states and 53466 transitions. [2021-06-12 22:13:39,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:13:39,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:39,433 INFO L225 Difference]: With dead ends: 18702 [2021-06-12 22:13:39,433 INFO L226 Difference]: Without dead ends: 18695 [2021-06-12 22:13:39,434 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 312.5ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:13:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18695 states. [2021-06-12 22:13:39,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18695 to 13690. [2021-06-12 22:13:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13690 states, 13689 states have (on average 2.9304551099422893) internal successors, (40115), 13689 states have internal predecessors, (40115), 0 states have call successors, (0), 0 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 22:13:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13690 states to 13690 states and 40115 transitions. [2021-06-12 22:13:39,674 INFO L78 Accepts]: Start accepts. Automaton has 13690 states and 40115 transitions. Word has length 37 [2021-06-12 22:13:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:39,674 INFO L482 AbstractCegarLoop]: Abstraction has 13690 states and 40115 transitions. [2021-06-12 22:13:39,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:13:39,674 INFO L276 IsEmpty]: Start isEmpty. Operand 13690 states and 40115 transitions. [2021-06-12 22:13:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:39,691 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:39,691 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:39,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:39,891 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:39,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:39,891 INFO L82 PathProgramCache]: Analyzing trace with hash -198586448, now seen corresponding path program 76 times [2021-06-12 22:13:39,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:39,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100645973] [2021-06-12 22:13:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:39,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:39,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100645973] [2021-06-12 22:13:39,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100645973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:39,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051458585] [2021-06-12 22:13:39,949 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:39,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:39,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:39,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:39,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:40,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051458585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:40,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:40,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:13:40,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491818646] [2021-06-12 22:13:40,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:13:40,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:40,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:13:40,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:13:40,097 INFO L87 Difference]: Start difference. First operand 13690 states and 40115 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 22:13:40,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:40,578 INFO L93 Difference]: Finished difference Result 19896 states and 57093 transitions. [2021-06-12 22:13:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:13:40,579 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:40,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:40,606 INFO L225 Difference]: With dead ends: 19896 [2021-06-12 22:13:40,606 INFO L226 Difference]: Without dead ends: 19782 [2021-06-12 22:13:40,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 365.4ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:13:40,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19782 states. [2021-06-12 22:13:40,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19782 to 15598. [2021-06-12 22:13:40,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15598 states, 15597 states have (on average 2.9260114124511123) internal successors, (45637), 15597 states have internal predecessors, (45637), 0 states have call successors, (0), 0 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 22:13:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15598 states to 15598 states and 45637 transitions. [2021-06-12 22:13:40,950 INFO L78 Accepts]: Start accepts. Automaton has 15598 states and 45637 transitions. Word has length 37 [2021-06-12 22:13:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:40,950 INFO L482 AbstractCegarLoop]: Abstraction has 15598 states and 45637 transitions. [2021-06-12 22:13:40,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 22:13:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 15598 states and 45637 transitions. [2021-06-12 22:13:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:40,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:40,967 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:41,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-12 22:13:41,168 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:41,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:41,168 INFO L82 PathProgramCache]: Analyzing trace with hash 52875454, now seen corresponding path program 77 times [2021-06-12 22:13:41,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:41,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579540129] [2021-06-12 22:13:41,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:41,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:41,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579540129] [2021-06-12 22:13:41,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579540129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:41,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320937205] [2021-06-12 22:13:41,192 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:41,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:13:41,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:41,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:41,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:41,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320937205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:41,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:41,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-12 22:13:41,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628743311] [2021-06-12 22:13:41,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:41,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:41,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:41,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:41,324 INFO L87 Difference]: Start difference. First operand 15598 states and 45637 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:13:41,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:41,785 INFO L93 Difference]: Finished difference Result 23975 states and 68834 transitions. [2021-06-12 22:13:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:13:41,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:41,819 INFO L225 Difference]: With dead ends: 23975 [2021-06-12 22:13:41,819 INFO L226 Difference]: Without dead ends: 23968 [2021-06-12 22:13:41,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:13:41,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23968 states. [2021-06-12 22:13:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23968 to 19902. [2021-06-12 22:13:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19902 states, 19901 states have (on average 2.9230189437716696) internal successors, (58171), 19901 states have internal predecessors, (58171), 0 states have call successors, (0), 0 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 22:13:42,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19902 states to 19902 states and 58171 transitions. [2021-06-12 22:13:42,158 INFO L78 Accepts]: Start accepts. Automaton has 19902 states and 58171 transitions. Word has length 37 [2021-06-12 22:13:42,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:42,158 INFO L482 AbstractCegarLoop]: Abstraction has 19902 states and 58171 transitions. [2021-06-12 22:13:42,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:13:42,158 INFO L276 IsEmpty]: Start isEmpty. Operand 19902 states and 58171 transitions. [2021-06-12 22:13:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:42,180 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:42,180 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:42,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-12 22:13:42,381 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:42,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:42,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1380437010, now seen corresponding path program 78 times [2021-06-12 22:13:42,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:42,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990821495] [2021-06-12 22:13:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:42,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:42,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990821495] [2021-06-12 22:13:42,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990821495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:42,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370881842] [2021-06-12 22:13:42,417 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:42,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:13:42,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:42,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:42,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:42,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370881842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:42,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:42,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:13:42,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498132786] [2021-06-12 22:13:42,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:13:42,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:42,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:13:42,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:13:42,537 INFO L87 Difference]: Start difference. First operand 19902 states and 58171 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 22:13:42,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:42,731 INFO L93 Difference]: Finished difference Result 22936 states and 66683 transitions. [2021-06-12 22:13:42,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:13:42,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:42,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:42,763 INFO L225 Difference]: With dead ends: 22936 [2021-06-12 22:13:42,763 INFO L226 Difference]: Without dead ends: 22936 [2021-06-12 22:13:42,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:42,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22936 states. [2021-06-12 22:13:43,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22936 to 20168. [2021-06-12 22:13:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20168 states, 20167 states have (on average 2.9221004611494026) internal successors, (58930), 20167 states have internal predecessors, (58930), 0 states have call successors, (0), 0 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 22:13:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20168 states to 20168 states and 58930 transitions. [2021-06-12 22:13:43,129 INFO L78 Accepts]: Start accepts. Automaton has 20168 states and 58930 transitions. Word has length 37 [2021-06-12 22:13:43,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:43,129 INFO L482 AbstractCegarLoop]: Abstraction has 20168 states and 58930 transitions. [2021-06-12 22:13:43,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 22:13:43,129 INFO L276 IsEmpty]: Start isEmpty. Operand 20168 states and 58930 transitions. [2021-06-12 22:13:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:43,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:43,151 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:43,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-12 22:13:43,365 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:43,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1382409982, now seen corresponding path program 79 times [2021-06-12 22:13:43,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:43,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491108623] [2021-06-12 22:13:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:43,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:43,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491108623] [2021-06-12 22:13:43,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491108623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:43,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984396747] [2021-06-12 22:13:43,408 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:43,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:43,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:43,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984396747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:43,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:43,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:13:43,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879517095] [2021-06-12 22:13:43,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:13:43,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:43,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:13:43,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:13:43,509 INFO L87 Difference]: Start difference. First operand 20168 states and 58930 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 22:13:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:43,665 INFO L93 Difference]: Finished difference Result 24551 states and 71034 transitions. [2021-06-12 22:13:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:13:43,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:43,699 INFO L225 Difference]: With dead ends: 24551 [2021-06-12 22:13:43,700 INFO L226 Difference]: Without dead ends: 24497 [2021-06-12 22:13:43,700 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24497 states. [2021-06-12 22:13:43,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24497 to 20168. [2021-06-12 22:13:43,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20168 states, 20167 states have (on average 2.9216046015768335) internal successors, (58920), 20167 states have internal predecessors, (58920), 0 states have call successors, (0), 0 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 22:13:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20168 states to 20168 states and 58920 transitions. [2021-06-12 22:13:44,020 INFO L78 Accepts]: Start accepts. Automaton has 20168 states and 58920 transitions. Word has length 37 [2021-06-12 22:13:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:44,020 INFO L482 AbstractCegarLoop]: Abstraction has 20168 states and 58920 transitions. [2021-06-12 22:13:44,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 22:13:44,020 INFO L276 IsEmpty]: Start isEmpty. Operand 20168 states and 58920 transitions. [2021-06-12 22:13:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:44,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:44,043 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:44,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-12 22:13:44,264 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:44,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1341647984, now seen corresponding path program 80 times [2021-06-12 22:13:44,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:44,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229049978] [2021-06-12 22:13:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:44,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:44,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229049978] [2021-06-12 22:13:44,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229049978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:44,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612671067] [2021-06-12 22:13:44,295 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:44,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:44,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:44,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:44,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:44,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612671067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:44,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:44,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:13:44,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297423056] [2021-06-12 22:13:44,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:44,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:44,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:44,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:44,413 INFO L87 Difference]: Start difference. First operand 20168 states and 58920 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:44,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:44,667 INFO L93 Difference]: Finished difference Result 22851 states and 66117 transitions. [2021-06-12 22:13:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:13:44,668 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:44,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:44,696 INFO L225 Difference]: With dead ends: 22851 [2021-06-12 22:13:44,696 INFO L226 Difference]: Without dead ends: 22851 [2021-06-12 22:13:44,696 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:13:44,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22851 states. [2021-06-12 22:13:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22851 to 20512. [2021-06-12 22:13:45,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20512 states, 20511 states have (on average 2.9201891667885524) internal successors, (59896), 20511 states have internal predecessors, (59896), 0 states have call successors, (0), 0 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 22:13:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20512 states to 20512 states and 59896 transitions. [2021-06-12 22:13:45,060 INFO L78 Accepts]: Start accepts. Automaton has 20512 states and 59896 transitions. Word has length 37 [2021-06-12 22:13:45,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:45,061 INFO L482 AbstractCegarLoop]: Abstraction has 20512 states and 59896 transitions. [2021-06-12 22:13:45,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 20512 states and 59896 transitions. [2021-06-12 22:13:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:45,084 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:45,084 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:45,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-12 22:13:45,284 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:45,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:45,284 INFO L82 PathProgramCache]: Analyzing trace with hash -461813350, now seen corresponding path program 81 times [2021-06-12 22:13:45,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:45,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684308159] [2021-06-12 22:13:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:45,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:45,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684308159] [2021-06-12 22:13:45,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684308159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:45,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534680453] [2021-06-12 22:13:45,340 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:45,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:13:45,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:45,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:45,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:45,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534680453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:45,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:45,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:13:45,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792145548] [2021-06-12 22:13:45,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:45,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:45,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:45,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:45,455 INFO L87 Difference]: Start difference. First operand 20512 states and 59896 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:45,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:45,747 INFO L93 Difference]: Finished difference Result 25378 states and 73051 transitions. [2021-06-12 22:13:45,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:13:45,747 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:45,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:45,785 INFO L225 Difference]: With dead ends: 25378 [2021-06-12 22:13:45,785 INFO L226 Difference]: Without dead ends: 25336 [2021-06-12 22:13:45,786 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:13:45,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25336 states. [2021-06-12 22:13:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25336 to 21132. [2021-06-12 22:13:46,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21132 states, 21131 states have (on average 2.924707775306422) internal successors, (61802), 21131 states have internal predecessors, (61802), 0 states have call successors, (0), 0 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 22:13:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 61802 transitions. [2021-06-12 22:13:46,176 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 61802 transitions. Word has length 37 [2021-06-12 22:13:46,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:46,176 INFO L482 AbstractCegarLoop]: Abstraction has 21132 states and 61802 transitions. [2021-06-12 22:13:46,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:46,176 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 61802 transitions. [2021-06-12 22:13:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:46,200 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:46,200 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:46,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:46,405 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:46,405 INFO L82 PathProgramCache]: Analyzing trace with hash -664281518, now seen corresponding path program 82 times [2021-06-12 22:13:46,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:46,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379328913] [2021-06-12 22:13:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:46,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:46,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379328913] [2021-06-12 22:13:46,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379328913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:46,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905658684] [2021-06-12 22:13:46,436 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:46,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:46,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:46,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:46,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:46,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905658684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:46,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:46,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:13:46,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581068039] [2021-06-12 22:13:46,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:46,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:46,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:46,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:46,542 INFO L87 Difference]: Start difference. First operand 21132 states and 61802 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:47,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:47,070 INFO L93 Difference]: Finished difference Result 26806 states and 77177 transitions. [2021-06-12 22:13:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:13:47,071 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:47,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:47,102 INFO L225 Difference]: With dead ends: 26806 [2021-06-12 22:13:47,102 INFO L226 Difference]: Without dead ends: 26806 [2021-06-12 22:13:47,103 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=425, Invalid=907, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:13:47,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26806 states. [2021-06-12 22:13:47,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26806 to 22606. [2021-06-12 22:13:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22606 states, 22605 states have (on average 2.92081397920814) internal successors, (66025), 22605 states have internal predecessors, (66025), 0 states have call successors, (0), 0 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 22:13:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22606 states to 22606 states and 66025 transitions. [2021-06-12 22:13:47,451 INFO L78 Accepts]: Start accepts. Automaton has 22606 states and 66025 transitions. Word has length 37 [2021-06-12 22:13:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:47,451 INFO L482 AbstractCegarLoop]: Abstraction has 22606 states and 66025 transitions. [2021-06-12 22:13:47,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 22606 states and 66025 transitions. [2021-06-12 22:13:47,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:47,476 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:47,476 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:47,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 22:13:47,677 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:47,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:47,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1702207848, now seen corresponding path program 83 times [2021-06-12 22:13:47,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:47,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218466712] [2021-06-12 22:13:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:47,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:47,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218466712] [2021-06-12 22:13:47,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218466712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:47,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488593583] [2021-06-12 22:13:47,710 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:47,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:13:47,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:47,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:47,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:47,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488593583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:47,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:47,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:13:47,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320846326] [2021-06-12 22:13:47,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:47,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:47,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:47,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:47,812 INFO L87 Difference]: Start difference. First operand 22606 states and 66025 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:48,196 INFO L93 Difference]: Finished difference Result 29720 states and 85805 transitions. [2021-06-12 22:13:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:13:48,196 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:48,240 INFO L225 Difference]: With dead ends: 29720 [2021-06-12 22:13:48,240 INFO L226 Difference]: Without dead ends: 29672 [2021-06-12 22:13:48,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:13:48,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29672 states. [2021-06-12 22:13:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29672 to 25600. [2021-06-12 22:13:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25600 states, 25599 states have (on average 2.913160670338685) internal successors, (74574), 25599 states have internal predecessors, (74574), 0 states have call successors, (0), 0 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 22:13:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25600 states to 25600 states and 74574 transitions. [2021-06-12 22:13:48,837 INFO L78 Accepts]: Start accepts. Automaton has 25600 states and 74574 transitions. Word has length 37 [2021-06-12 22:13:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:48,837 INFO L482 AbstractCegarLoop]: Abstraction has 25600 states and 74574 transitions. [2021-06-12 22:13:48,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 25600 states and 74574 transitions. [2021-06-12 22:13:48,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:48,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:48,864 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:49,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 22:13:49,065 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:49,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:49,065 INFO L82 PathProgramCache]: Analyzing trace with hash 369493936, now seen corresponding path program 84 times [2021-06-12 22:13:49,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:49,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843586036] [2021-06-12 22:13:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:49,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:49,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843586036] [2021-06-12 22:13:49,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843586036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:49,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756856114] [2021-06-12 22:13:49,255 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:49,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:13:49,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:49,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:49,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:49,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756856114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:49,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:49,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:13:49,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839110242] [2021-06-12 22:13:49,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:49,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:49,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:49,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:49,358 INFO L87 Difference]: Start difference. First operand 25600 states and 74574 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:49,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:49,905 INFO L93 Difference]: Finished difference Result 31521 states and 90635 transitions. [2021-06-12 22:13:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:13:49,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:49,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:49,951 INFO L225 Difference]: With dead ends: 31521 [2021-06-12 22:13:49,951 INFO L226 Difference]: Without dead ends: 31521 [2021-06-12 22:13:49,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 326.1ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:13:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31521 states. [2021-06-12 22:13:50,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31521 to 27384. [2021-06-12 22:13:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27384 states, 27383 states have (on average 2.9259759704926416) internal successors, (80122), 27383 states have internal predecessors, (80122), 0 states have call successors, (0), 0 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 22:13:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27384 states to 27384 states and 80122 transitions. [2021-06-12 22:13:50,531 INFO L78 Accepts]: Start accepts. Automaton has 27384 states and 80122 transitions. Word has length 37 [2021-06-12 22:13:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:50,531 INFO L482 AbstractCegarLoop]: Abstraction has 27384 states and 80122 transitions. [2021-06-12 22:13:50,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 22:13:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 27384 states and 80122 transitions. [2021-06-12 22:13:50,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:50,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:50,568 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:50,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:50,768 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:50,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:50,768 INFO L82 PathProgramCache]: Analyzing trace with hash 158796890, now seen corresponding path program 85 times [2021-06-12 22:13:50,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:50,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377180225] [2021-06-12 22:13:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:50,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:50,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377180225] [2021-06-12 22:13:50,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377180225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:50,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055063109] [2021-06-12 22:13:50,804 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:50,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:50,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:50,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055063109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:50,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:50,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:13:50,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90595651] [2021-06-12 22:13:50,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:50,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:50,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:50,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:50,930 INFO L87 Difference]: Start difference. First operand 27384 states and 80122 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:51,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:51,481 INFO L93 Difference]: Finished difference Result 33285 states and 96447 transitions. [2021-06-12 22:13:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:13:51,481 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:51,630 INFO L225 Difference]: With dead ends: 33285 [2021-06-12 22:13:51,630 INFO L226 Difference]: Without dead ends: 33267 [2021-06-12 22:13:51,631 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:13:51,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33267 states. [2021-06-12 22:13:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33267 to 27954. [2021-06-12 22:13:52,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27954 states, 27953 states have (on average 2.9269488069259113) internal successors, (81817), 27953 states have internal predecessors, (81817), 0 states have call successors, (0), 0 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 22:13:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27954 states to 27954 states and 81817 transitions. [2021-06-12 22:13:52,272 INFO L78 Accepts]: Start accepts. Automaton has 27954 states and 81817 transitions. Word has length 37 [2021-06-12 22:13:52,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:52,272 INFO L482 AbstractCegarLoop]: Abstraction has 27954 states and 81817 transitions. [2021-06-12 22:13:52,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 22:13:52,272 INFO L276 IsEmpty]: Start isEmpty. Operand 27954 states and 81817 transitions. [2021-06-12 22:13:52,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:52,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:52,306 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:52,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:52,507 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:52,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:52,507 INFO L82 PathProgramCache]: Analyzing trace with hash 887548708, now seen corresponding path program 86 times [2021-06-12 22:13:52,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:52,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175911746] [2021-06-12 22:13:52,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:52,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:52,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175911746] [2021-06-12 22:13:52,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175911746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:52,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921185423] [2021-06-12 22:13:52,555 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:52,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:52,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:52,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:52,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:52,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921185423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:52,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:52,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:13:52,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021285013] [2021-06-12 22:13:52,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:52,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:52,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:52,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:52,660 INFO L87 Difference]: Start difference. First operand 27954 states and 81817 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 22:13:53,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:53,267 INFO L93 Difference]: Finished difference Result 32376 states and 93008 transitions. [2021-06-12 22:13:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:13:53,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) Word has length 37 [2021-06-12 22:13:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:53,395 INFO L225 Difference]: With dead ends: 32376 [2021-06-12 22:13:53,395 INFO L226 Difference]: Without dead ends: 32369 [2021-06-12 22:13:53,395 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 416.8ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:13:53,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32369 states. [2021-06-12 22:13:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32369 to 27014. [2021-06-12 22:13:53,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27014 states, 27013 states have (on average 2.914559656461704) internal successors, (78731), 27013 states have internal predecessors, (78731), 0 states have call successors, (0), 0 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 22:13:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27014 states to 27014 states and 78731 transitions. [2021-06-12 22:13:53,915 INFO L78 Accepts]: Start accepts. Automaton has 27014 states and 78731 transitions. Word has length 37 [2021-06-12 22:13:53,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:53,915 INFO L482 AbstractCegarLoop]: Abstraction has 27014 states and 78731 transitions. [2021-06-12 22:13:53,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 22:13:53,915 INFO L276 IsEmpty]: Start isEmpty. Operand 27014 states and 78731 transitions. [2021-06-12 22:13:53,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:53,950 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:53,950 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:54,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:54,150 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:54,151 INFO L82 PathProgramCache]: Analyzing trace with hash 510577554, now seen corresponding path program 87 times [2021-06-12 22:13:54,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:54,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745076848] [2021-06-12 22:13:54,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:54,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:54,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745076848] [2021-06-12 22:13:54,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745076848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:54,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957178151] [2021-06-12 22:13:54,191 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:54,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:13:54,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:54,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:54,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:54,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957178151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:54,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:54,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:13:54,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553574754] [2021-06-12 22:13:54,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:54,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:54,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:54,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:54,472 INFO L87 Difference]: Start difference. First operand 27014 states and 78731 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 22:13:54,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:54,875 INFO L93 Difference]: Finished difference Result 29628 states and 85439 transitions. [2021-06-12 22:13:54,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:13:54,876 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) Word has length 37 [2021-06-12 22:13:54,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:54,920 INFO L225 Difference]: With dead ends: 29628 [2021-06-12 22:13:54,920 INFO L226 Difference]: Without dead ends: 29614 [2021-06-12 22:13:54,920 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 361.9ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:13:55,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29614 states. [2021-06-12 22:13:55,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29614 to 23956. [2021-06-12 22:13:55,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23956 states, 23955 states have (on average 2.914631600918389) internal successors, (69820), 23955 states have internal predecessors, (69820), 0 states have call successors, (0), 0 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 22:13:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23956 states to 23956 states and 69820 transitions. [2021-06-12 22:13:55,407 INFO L78 Accepts]: Start accepts. Automaton has 23956 states and 69820 transitions. Word has length 37 [2021-06-12 22:13:55,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:55,407 INFO L482 AbstractCegarLoop]: Abstraction has 23956 states and 69820 transitions. [2021-06-12 22:13:55,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 22:13:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 23956 states and 69820 transitions. [2021-06-12 22:13:55,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:55,432 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:55,432 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:55,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-12 22:13:55,633 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:55,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:55,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1704477878, now seen corresponding path program 88 times [2021-06-12 22:13:55,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:55,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721112696] [2021-06-12 22:13:55,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:55,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:55,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721112696] [2021-06-12 22:13:55,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721112696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:55,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739118275] [2021-06-12 22:13:55,680 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:55,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:55,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:55,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:55,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:55,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739118275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:55,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:55,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:13:55,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10884799] [2021-06-12 22:13:55,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:13:55,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:55,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:13:55,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:13:55,823 INFO L87 Difference]: Start difference. First operand 23956 states and 69820 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 22:13:56,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:56,344 INFO L93 Difference]: Finished difference Result 28263 states and 81286 transitions. [2021-06-12 22:13:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:13:56,346 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:56,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:56,396 INFO L225 Difference]: With dead ends: 28263 [2021-06-12 22:13:56,396 INFO L226 Difference]: Without dead ends: 28251 [2021-06-12 22:13:56,397 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:13:56,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28251 states. [2021-06-12 22:13:56,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28251 to 24282. [2021-06-12 22:13:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24282 states, 24281 states have (on average 2.9153247395082573) internal successors, (70787), 24281 states have internal predecessors, (70787), 0 states have call successors, (0), 0 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 22:13:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24282 states to 24282 states and 70787 transitions. [2021-06-12 22:13:56,879 INFO L78 Accepts]: Start accepts. Automaton has 24282 states and 70787 transitions. Word has length 37 [2021-06-12 22:13:56,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:56,879 INFO L482 AbstractCegarLoop]: Abstraction has 24282 states and 70787 transitions. [2021-06-12 22:13:56,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 22:13:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 24282 states and 70787 transitions. [2021-06-12 22:13:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:56,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:56,905 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:57,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 22:13:57,106 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:57,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:57,106 INFO L82 PathProgramCache]: Analyzing trace with hash 606853100, now seen corresponding path program 89 times [2021-06-12 22:13:57,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:57,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832227974] [2021-06-12 22:13:57,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:57,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:57,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832227974] [2021-06-12 22:13:57,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832227974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:57,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617944642] [2021-06-12 22:13:57,142 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:57,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:13:57,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:57,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:57,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:57,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617944642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:57,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:57,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:13:57,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825731853] [2021-06-12 22:13:57,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:57,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:57,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:57,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:57,263 INFO L87 Difference]: Start difference. First operand 24282 states and 70787 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 22:13:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:57,799 INFO L93 Difference]: Finished difference Result 30400 states and 87330 transitions. [2021-06-12 22:13:57,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:13:57,799 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:57,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:57,845 INFO L225 Difference]: With dead ends: 30400 [2021-06-12 22:13:57,845 INFO L226 Difference]: Without dead ends: 30394 [2021-06-12 22:13:57,845 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 367.0ms TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:13:57,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30394 states. [2021-06-12 22:13:58,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30394 to 24292. [2021-06-12 22:13:58,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24292 states, 24291 states have (on average 2.915647770779301) internal successors, (70824), 24291 states have internal predecessors, (70824), 0 states have call successors, (0), 0 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 22:13:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24292 states to 24292 states and 70824 transitions. [2021-06-12 22:13:58,300 INFO L78 Accepts]: Start accepts. Automaton has 24292 states and 70824 transitions. Word has length 37 [2021-06-12 22:13:58,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:58,300 INFO L482 AbstractCegarLoop]: Abstraction has 24292 states and 70824 transitions. [2021-06-12 22:13:58,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 22:13:58,300 INFO L276 IsEmpty]: Start isEmpty. Operand 24292 states and 70824 transitions. [2021-06-12 22:13:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:13:58,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:58,328 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:58,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-12 22:13:58,528 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:58,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:58,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1506148470, now seen corresponding path program 90 times [2021-06-12 22:13:58,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:58,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50900336] [2021-06-12 22:13:58,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:58,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:58,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50900336] [2021-06-12 22:13:58,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50900336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:58,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846083144] [2021-06-12 22:13:58,559 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:58,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:13:58,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:13:58,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:58,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846083144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:58,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:58,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:13:58,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590960056] [2021-06-12 22:13:58,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:13:58,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:58,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:13:58,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:13:58,702 INFO L87 Difference]: Start difference. First operand 24292 states and 70824 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 22:13:58,986 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2021-06-12 22:13:59,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:59,350 INFO L93 Difference]: Finished difference Result 31964 states and 91804 transitions. [2021-06-12 22:13:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:13:59,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 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 37 [2021-06-12 22:13:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:59,403 INFO L225 Difference]: With dead ends: 31964 [2021-06-12 22:13:59,403 INFO L226 Difference]: Without dead ends: 31964 [2021-06-12 22:13:59,404 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 442.9ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:13:59,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31964 states. [2021-06-12 22:13:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31964 to 26278. [2021-06-12 22:13:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26278 states, 26277 states have (on average 2.919244967081478) internal successors, (76709), 26277 states have internal predecessors, (76709), 0 states have call successors, (0), 0 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 22:13:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26278 states to 26278 states and 76709 transitions. [2021-06-12 22:13:59,977 INFO L78 Accepts]: Start accepts. Automaton has 26278 states and 76709 transitions. Word has length 37 [2021-06-12 22:13:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:59,977 INFO L482 AbstractCegarLoop]: Abstraction has 26278 states and 76709 transitions. [2021-06-12 22:13:59,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 22:13:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 26278 states and 76709 transitions. [2021-06-12 22:14:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:14:00,014 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:00,014 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:00,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-12 22:14:00,215 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:00,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:00,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1647232088, now seen corresponding path program 91 times [2021-06-12 22:14:00,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:00,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734356356] [2021-06-12 22:14:00,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:00,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:00,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734356356] [2021-06-12 22:14:00,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734356356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:00,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71464895] [2021-06-12 22:14:00,242 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:00,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:00,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:00,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71464895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:00,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:00,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:14:00,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799205190] [2021-06-12 22:14:00,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:00,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:00,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:00,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:00,361 INFO L87 Difference]: Start difference. First operand 26278 states and 76709 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:14:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:00,945 INFO L93 Difference]: Finished difference Result 31151 states and 89602 transitions. [2021-06-12 22:14:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:14:00,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 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 37 [2021-06-12 22:14:00,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:00,988 INFO L225 Difference]: With dead ends: 31151 [2021-06-12 22:14:00,989 INFO L226 Difference]: Without dead ends: 31130 [2021-06-12 22:14:00,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 371.8ms TimeCoverageRelationStatistics Valid=430, Invalid=830, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:14:01,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31130 states. [2021-06-12 22:14:01,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31130 to 23206. [2021-06-12 22:14:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23206 states, 23205 states have (on average 2.908554190907132) internal successors, (67493), 23205 states have internal predecessors, (67493), 0 states have call successors, (0), 0 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 22:14:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23206 states to 23206 states and 67493 transitions. [2021-06-12 22:14:01,427 INFO L78 Accepts]: Start accepts. Automaton has 23206 states and 67493 transitions. Word has length 37 [2021-06-12 22:14:01,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:01,427 INFO L482 AbstractCegarLoop]: Abstraction has 23206 states and 67493 transitions. [2021-06-12 22:14:01,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:14:01,427 INFO L276 IsEmpty]: Start isEmpty. Operand 23206 states and 67493 transitions. [2021-06-12 22:14:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:14:01,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:01,452 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:01,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:01,653 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:01,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1731630862, now seen corresponding path program 92 times [2021-06-12 22:14:01,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:01,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135018274] [2021-06-12 22:14:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:01,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:01,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135018274] [2021-06-12 22:14:01,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135018274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:01,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431393403] [2021-06-12 22:14:01,691 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:01,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:01,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:01,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:01,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:01,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431393403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:01,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:01,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:14:01,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071757352] [2021-06-12 22:14:01,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:01,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:01,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:01,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:01,919 INFO L87 Difference]: Start difference. First operand 23206 states and 67493 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:14:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:02,303 INFO L93 Difference]: Finished difference Result 29544 states and 84782 transitions. [2021-06-12 22:14:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:14:02,303 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 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 37 [2021-06-12 22:14:02,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:02,351 INFO L225 Difference]: With dead ends: 29544 [2021-06-12 22:14:02,351 INFO L226 Difference]: Without dead ends: 29488 [2021-06-12 22:14:02,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:14:02,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29488 states. [2021-06-12 22:14:02,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29488 to 24042. [2021-06-12 22:14:02,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24042 states, 24041 states have (on average 2.9141466661120585) internal successors, (70059), 24041 states have internal predecessors, (70059), 0 states have call successors, (0), 0 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 22:14:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24042 states to 24042 states and 70059 transitions. [2021-06-12 22:14:02,824 INFO L78 Accepts]: Start accepts. Automaton has 24042 states and 70059 transitions. Word has length 37 [2021-06-12 22:14:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:02,824 INFO L482 AbstractCegarLoop]: Abstraction has 24042 states and 70059 transitions. [2021-06-12 22:14:02,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:14:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 24042 states and 70059 transitions. [2021-06-12 22:14:02,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:14:02,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:02,850 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:03,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-12 22:14:03,050 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:03,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1163931468, now seen corresponding path program 93 times [2021-06-12 22:14:03,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:03,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180052500] [2021-06-12 22:14:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:03,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:03,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180052500] [2021-06-12 22:14:03,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180052500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:03,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648555290] [2021-06-12 22:14:03,088 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:03,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:14:03,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:03,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:03,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:03,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648555290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:03,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:03,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:14:03,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604625103] [2021-06-12 22:14:03,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:14:03,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:03,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:14:03,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:14:03,286 INFO L87 Difference]: Start difference. First operand 24042 states and 70059 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:14:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:03,689 INFO L93 Difference]: Finished difference Result 30061 states and 86344 transitions. [2021-06-12 22:14:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:14:03,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 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 37 [2021-06-12 22:14:03,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:03,734 INFO L225 Difference]: With dead ends: 30061 [2021-06-12 22:14:03,734 INFO L226 Difference]: Without dead ends: 30049 [2021-06-12 22:14:03,734 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:14:03,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30049 states. [2021-06-12 22:14:04,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30049 to 25534. [2021-06-12 22:14:04,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25534 states, 25533 states have (on average 2.906708964868993) internal successors, (74217), 25533 states have internal predecessors, (74217), 0 states have call successors, (0), 0 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 22:14:04,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25534 states to 25534 states and 74217 transitions. [2021-06-12 22:14:04,175 INFO L78 Accepts]: Start accepts. Automaton has 25534 states and 74217 transitions. Word has length 37 [2021-06-12 22:14:04,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:04,175 INFO L482 AbstractCegarLoop]: Abstraction has 25534 states and 74217 transitions. [2021-06-12 22:14:04,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:14:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 25534 states and 74217 transitions. [2021-06-12 22:14:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:14:04,200 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:04,200 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:04,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-12 22:14:04,401 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:04,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:04,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1502315474, now seen corresponding path program 94 times [2021-06-12 22:14:04,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:04,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582992961] [2021-06-12 22:14:04,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:04,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:04,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582992961] [2021-06-12 22:14:04,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582992961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:04,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745128251] [2021-06-12 22:14:04,427 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:04,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:04,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:04,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:04,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:04,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745128251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:04,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:04,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:14:04,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797175936] [2021-06-12 22:14:04,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:04,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:04,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:04,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:04,634 INFO L87 Difference]: Start difference. First operand 25534 states and 74217 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:14:05,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:05,150 INFO L93 Difference]: Finished difference Result 36194 states and 103786 transitions. [2021-06-12 22:14:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:14:05,151 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 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 37 [2021-06-12 22:14:05,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:05,208 INFO L225 Difference]: With dead ends: 36194 [2021-06-12 22:14:05,208 INFO L226 Difference]: Without dead ends: 36188 [2021-06-12 22:14:05,208 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 390.2ms TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:14:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36188 states. [2021-06-12 22:14:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36188 to 29604. [2021-06-12 22:14:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29604 states, 29603 states have (on average 2.912745329865216) internal successors, (86226), 29603 states have internal predecessors, (86226), 0 states have call successors, (0), 0 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 22:14:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29604 states to 29604 states and 86226 transitions. [2021-06-12 22:14:05,887 INFO L78 Accepts]: Start accepts. Automaton has 29604 states and 86226 transitions. Word has length 37 [2021-06-12 22:14:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:05,887 INFO L482 AbstractCegarLoop]: Abstraction has 29604 states and 86226 transitions. [2021-06-12 22:14:05,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:14:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 29604 states and 86226 transitions. [2021-06-12 22:14:05,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:14:05,921 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:05,921 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:06,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:06,121 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:06,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:06,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1313090188, now seen corresponding path program 95 times [2021-06-12 22:14:06,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:06,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7683798] [2021-06-12 22:14:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:06,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:06,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7683798] [2021-06-12 22:14:06,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7683798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:06,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766240118] [2021-06-12 22:14:06,145 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:06,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:14:06,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:06,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:06,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:06,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766240118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:06,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:06,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-12 22:14:06,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306662909] [2021-06-12 22:14:06,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:06,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:06,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:06,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:06,264 INFO L87 Difference]: Start difference. First operand 29604 states and 86226 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:14:06,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:06,921 INFO L93 Difference]: Finished difference Result 41937 states and 120606 transitions. [2021-06-12 22:14:06,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:14:06,932 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 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 37 [2021-06-12 22:14:06,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:07,003 INFO L225 Difference]: With dead ends: 41937 [2021-06-12 22:14:07,003 INFO L226 Difference]: Without dead ends: 41937 [2021-06-12 22:14:07,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:14:07,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41937 states. [2021-06-12 22:14:07,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41937 to 35832. [2021-06-12 22:14:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35832 states, 35831 states have (on average 2.9105523150344674) internal successors, (104288), 35831 states have internal predecessors, (104288), 0 states have call successors, (0), 0 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 22:14:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35832 states to 35832 states and 104288 transitions. [2021-06-12 22:14:07,717 INFO L78 Accepts]: Start accepts. Automaton has 35832 states and 104288 transitions. Word has length 37 [2021-06-12 22:14:07,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:07,717 INFO L482 AbstractCegarLoop]: Abstraction has 35832 states and 104288 transitions. [2021-06-12 22:14:07,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:14:07,717 INFO L276 IsEmpty]: Start isEmpty. Operand 35832 states and 104288 transitions. [2021-06-12 22:14:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:14:07,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:07,764 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:07,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:07,977 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:07,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:07,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1172006570, now seen corresponding path program 96 times [2021-06-12 22:14:07,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:07,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384424986] [2021-06-12 22:14:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:08,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:08,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384424986] [2021-06-12 22:14:08,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384424986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:08,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030106592] [2021-06-12 22:14:08,002 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:08,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:14:08,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:08,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:08,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:08,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030106592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:08,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:08,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-12 22:14:08,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306876364] [2021-06-12 22:14:08,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:14:08,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:08,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:14:08,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:14:08,122 INFO L87 Difference]: Start difference. First operand 35832 states and 104288 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:14:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:08,750 INFO L93 Difference]: Finished difference Result 41300 states and 118909 transitions. [2021-06-12 22:14:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:14:08,751 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 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 37 [2021-06-12 22:14:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:08,818 INFO L225 Difference]: With dead ends: 41300 [2021-06-12 22:14:08,819 INFO L226 Difference]: Without dead ends: 41286 [2021-06-12 22:14:08,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=466, Invalid=940, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:14:08,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41286 states. [2021-06-12 22:14:09,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41286 to 35320. [2021-06-12 22:14:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35320 states, 35319 states have (on average 2.9060845437300036) internal successors, (102640), 35319 states have internal predecessors, (102640), 0 states have call successors, (0), 0 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 22:14:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35320 states to 35320 states and 102640 transitions. [2021-06-12 22:14:09,614 INFO L78 Accepts]: Start accepts. Automaton has 35320 states and 102640 transitions. Word has length 37 [2021-06-12 22:14:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:09,614 INFO L482 AbstractCegarLoop]: Abstraction has 35320 states and 102640 transitions. [2021-06-12 22:14:09,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:14:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 35320 states and 102640 transitions. [2021-06-12 22:14:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:14:09,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:09,655 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:09,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:09,857 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1087607796, now seen corresponding path program 97 times [2021-06-12 22:14:09,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:09,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384124994] [2021-06-12 22:14:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:14:09,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:09,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384124994] [2021-06-12 22:14:09,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384124994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:09,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638918064] [2021-06-12 22:14:09,888 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:09,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:09,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:10,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638918064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:10,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:10,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:14:10,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948061114] [2021-06-12 22:14:10,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:14:10,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:10,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:14:10,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:14:10,039 INFO L87 Difference]: Start difference. First operand 35320 states and 102640 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:14:10,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:10,783 INFO L93 Difference]: Finished difference Result 41805 states and 120268 transitions. [2021-06-12 22:14:10,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:14:10,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 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 37 [2021-06-12 22:14:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:10,863 INFO L225 Difference]: With dead ends: 41805 [2021-06-12 22:14:10,863 INFO L226 Difference]: Without dead ends: 41749 [2021-06-12 22:14:10,863 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:14:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41749 states. [2021-06-12 22:14:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41749 to 36324. [2021-06-12 22:14:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36324 states, 36323 states have (on average 2.9055970046526993) internal successors, (105540), 36323 states have internal predecessors, (105540), 0 states have call successors, (0), 0 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 22:14:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36324 states to 36324 states and 105540 transitions. [2021-06-12 22:14:11,581 INFO L78 Accepts]: Start accepts. Automaton has 36324 states and 105540 transitions. Word has length 37 [2021-06-12 22:14:11,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:11,581 INFO L482 AbstractCegarLoop]: Abstraction has 36324 states and 105540 transitions. [2021-06-12 22:14:11,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:14:11,581 INFO L276 IsEmpty]: Start isEmpty. Operand 36324 states and 105540 transitions. [2021-06-12 22:14:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:14:11,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:11,622 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:11,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:11,824 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:11,824 INFO L82 PathProgramCache]: Analyzing trace with hash 552429714, now seen corresponding path program 98 times [2021-06-12 22:14:11,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:11,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402454400] [2021-06-12 22:14:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:11,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:11,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402454400] [2021-06-12 22:14:11,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402454400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:11,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21066964] [2021-06-12 22:14:11,862 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:11,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:11,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:11,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:14:11,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:11,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21066964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:11,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:11,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:14:11,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112422706] [2021-06-12 22:14:11,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:14:11,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:11,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:14:11,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:14:11,977 INFO L87 Difference]: Start difference. First operand 36324 states and 105540 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:14:12,273 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-12 22:14:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:12,527 INFO L93 Difference]: Finished difference Result 42907 states and 123545 transitions. [2021-06-12 22:14:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:14:12,528 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 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 37 [2021-06-12 22:14:12,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:12,595 INFO L225 Difference]: With dead ends: 42907 [2021-06-12 22:14:12,595 INFO L226 Difference]: Without dead ends: 42809 [2021-06-12 22:14:12,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:14:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42809 states. [2021-06-12 22:14:13,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42809 to 37654. [2021-06-12 22:14:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37654 states, 37653 states have (on average 2.904708788144371) internal successors, (109371), 37653 states have internal predecessors, (109371), 0 states have call successors, (0), 0 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 22:14:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37654 states to 37654 states and 109371 transitions. [2021-06-12 22:14:13,433 INFO L78 Accepts]: Start accepts. Automaton has 37654 states and 109371 transitions. Word has length 37 [2021-06-12 22:14:13,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:13,433 INFO L482 AbstractCegarLoop]: Abstraction has 37654 states and 109371 transitions. [2021-06-12 22:14:13,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 22:14:13,433 INFO L276 IsEmpty]: Start isEmpty. Operand 37654 states and 109371 transitions. [2021-06-12 22:14:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:13,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:13,482 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:13,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:13,682 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:13,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:13,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1312568382, now seen corresponding path program 99 times [2021-06-12 22:14:13,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:13,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050033535] [2021-06-12 22:14:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:13,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:13,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050033535] [2021-06-12 22:14:13,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050033535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:13,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789194594] [2021-06-12 22:14:13,854 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:13,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:14:13,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:13,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:14:13,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:14,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789194594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:14,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:14,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-12 22:14:14,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647966070] [2021-06-12 22:14:14,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:14:14,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:14,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:14:14,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:14:14,058 INFO L87 Difference]: Start difference. First operand 37654 states and 109371 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 22:14:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:14,418 INFO L93 Difference]: Finished difference Result 53826 states and 156188 transitions. [2021-06-12 22:14:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:14:14,419 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:14,676 INFO L225 Difference]: With dead ends: 53826 [2021-06-12 22:14:14,676 INFO L226 Difference]: Without dead ends: 53788 [2021-06-12 22:14:14,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:14:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53788 states. [2021-06-12 22:14:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53788 to 37682. [2021-06-12 22:14:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37682 states, 37681 states have (on average 2.90414267137284) internal successors, (109431), 37681 states have internal predecessors, (109431), 0 states have call successors, (0), 0 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 22:14:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37682 states to 37682 states and 109431 transitions. [2021-06-12 22:14:15,323 INFO L78 Accepts]: Start accepts. Automaton has 37682 states and 109431 transitions. Word has length 40 [2021-06-12 22:14:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:15,323 INFO L482 AbstractCegarLoop]: Abstraction has 37682 states and 109431 transitions. [2021-06-12 22:14:15,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 22:14:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 37682 states and 109431 transitions. [2021-06-12 22:14:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:15,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:15,366 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:15,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-12 22:14:15,588 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:15,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:15,589 INFO L82 PathProgramCache]: Analyzing trace with hash 920480774, now seen corresponding path program 100 times [2021-06-12 22:14:15,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:15,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951834504] [2021-06-12 22:14:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:15,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:15,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951834504] [2021-06-12 22:14:15,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951834504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:15,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316120036] [2021-06-12 22:14:15,715 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:15,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:15,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:15,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:14:15,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:15,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316120036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:15,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:15,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 22:14:15,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930073026] [2021-06-12 22:14:15,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:14:15,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:15,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:14:15,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:14:15,913 INFO L87 Difference]: Start difference. First operand 37682 states and 109431 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:14:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:16,588 INFO L93 Difference]: Finished difference Result 61487 states and 178572 transitions. [2021-06-12 22:14:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:14:16,589 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:16,693 INFO L225 Difference]: With dead ends: 61487 [2021-06-12 22:14:16,693 INFO L226 Difference]: Without dead ends: 61405 [2021-06-12 22:14:16,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:14:16,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61405 states. [2021-06-12 22:14:17,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61405 to 44129. [2021-06-12 22:14:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44129 states, 44128 states have (on average 2.9096718636693257) internal successors, (128398), 44128 states have internal predecessors, (128398), 0 states have call successors, (0), 0 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 22:14:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44129 states to 44129 states and 128398 transitions. [2021-06-12 22:14:17,756 INFO L78 Accepts]: Start accepts. Automaton has 44129 states and 128398 transitions. Word has length 40 [2021-06-12 22:14:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:17,756 INFO L482 AbstractCegarLoop]: Abstraction has 44129 states and 128398 transitions. [2021-06-12 22:14:17,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:14:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 44129 states and 128398 transitions. [2021-06-12 22:14:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:17,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:17,806 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:18,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 22:14:18,006 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:18,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1516586690, now seen corresponding path program 101 times [2021-06-12 22:14:18,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:18,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477996827] [2021-06-12 22:14:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:18,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:18,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477996827] [2021-06-12 22:14:18,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477996827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:18,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949589559] [2021-06-12 22:14:18,123 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:18,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:14:18,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:18,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:14:18,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:18,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949589559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:18,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:18,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 22:14:18,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652050869] [2021-06-12 22:14:18,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:14:18,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:18,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:14:18,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:14:18,327 INFO L87 Difference]: Start difference. First operand 44129 states and 128398 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:14:19,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:19,165 INFO L93 Difference]: Finished difference Result 61471 states and 178534 transitions. [2021-06-12 22:14:19,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:14:19,166 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:19,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:19,272 INFO L225 Difference]: With dead ends: 61471 [2021-06-12 22:14:19,272 INFO L226 Difference]: Without dead ends: 61359 [2021-06-12 22:14:19,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 334.5ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:14:19,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61359 states. [2021-06-12 22:14:20,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61359 to 42975. [2021-06-12 22:14:20,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42975 states, 42974 states have (on average 2.9057336994461767) internal successors, (124871), 42974 states have internal predecessors, (124871), 0 states have call successors, (0), 0 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 22:14:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42975 states to 42975 states and 124871 transitions. [2021-06-12 22:14:20,303 INFO L78 Accepts]: Start accepts. Automaton has 42975 states and 124871 transitions. Word has length 40 [2021-06-12 22:14:20,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:20,303 INFO L482 AbstractCegarLoop]: Abstraction has 42975 states and 124871 transitions. [2021-06-12 22:14:20,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:14:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 42975 states and 124871 transitions. [2021-06-12 22:14:20,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:20,355 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:20,356 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:20,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-12 22:14:20,556 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:20,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:20,557 INFO L82 PathProgramCache]: Analyzing trace with hash 459063162, now seen corresponding path program 102 times [2021-06-12 22:14:20,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:20,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685741018] [2021-06-12 22:14:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:20,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:20,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685741018] [2021-06-12 22:14:20,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685741018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:20,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905536116] [2021-06-12 22:14:20,700 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:20,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:14:20,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:20,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:14:20,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:20,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905536116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:20,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:20,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-12 22:14:20,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345293109] [2021-06-12 22:14:20,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:14:20,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:20,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:14:20,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:14:20,932 INFO L87 Difference]: Start difference. First operand 42975 states and 124871 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 22:14:21,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:21,950 INFO L93 Difference]: Finished difference Result 61721 states and 178788 transitions. [2021-06-12 22:14:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:14:21,950 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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) Word has length 40 [2021-06-12 22:14:21,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:22,058 INFO L225 Difference]: With dead ends: 61721 [2021-06-12 22:14:22,058 INFO L226 Difference]: Without dead ends: 61604 [2021-06-12 22:14:22,058 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 537.7ms TimeCoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:14:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61604 states. [2021-06-12 22:14:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61604 to 43605. [2021-06-12 22:14:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43605 states, 43604 states have (on average 2.906338867993762) internal successors, (126728), 43604 states have internal predecessors, (126728), 0 states have call successors, (0), 0 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 22:14:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43605 states to 43605 states and 126728 transitions. [2021-06-12 22:14:23,063 INFO L78 Accepts]: Start accepts. Automaton has 43605 states and 126728 transitions. Word has length 40 [2021-06-12 22:14:23,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:23,063 INFO L482 AbstractCegarLoop]: Abstraction has 43605 states and 126728 transitions. [2021-06-12 22:14:23,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 22:14:23,063 INFO L276 IsEmpty]: Start isEmpty. Operand 43605 states and 126728 transitions. [2021-06-12 22:14:23,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:23,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:23,111 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:23,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:23,313 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:23,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1637637984, now seen corresponding path program 103 times [2021-06-12 22:14:23,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:23,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104709796] [2021-06-12 22:14:23,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:23,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:23,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104709796] [2021-06-12 22:14:23,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104709796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:23,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203821950] [2021-06-12 22:14:23,443 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:23,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:14:23,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:23,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203821950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:23,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:23,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 22:14:23,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482662805] [2021-06-12 22:14:23,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:14:23,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:23,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:14:23,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:14:23,634 INFO L87 Difference]: Start difference. First operand 43605 states and 126728 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:14:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:24,270 INFO L93 Difference]: Finished difference Result 61267 states and 177882 transitions. [2021-06-12 22:14:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:14:24,271 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:24,379 INFO L225 Difference]: With dead ends: 61267 [2021-06-12 22:14:24,379 INFO L226 Difference]: Without dead ends: 61191 [2021-06-12 22:14:24,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:14:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61191 states. [2021-06-12 22:14:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61191 to 44261. [2021-06-12 22:14:25,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44261 states, 44260 states have (on average 2.9074107546317216) internal successors, (128682), 44260 states have internal predecessors, (128682), 0 states have call successors, (0), 0 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 22:14:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44261 states to 44261 states and 128682 transitions. [2021-06-12 22:14:25,440 INFO L78 Accepts]: Start accepts. Automaton has 44261 states and 128682 transitions. Word has length 40 [2021-06-12 22:14:25,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:25,440 INFO L482 AbstractCegarLoop]: Abstraction has 44261 states and 128682 transitions. [2021-06-12 22:14:25,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:14:25,440 INFO L276 IsEmpty]: Start isEmpty. Operand 44261 states and 128682 transitions. [2021-06-12 22:14:25,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:25,490 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:25,490 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:25,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:25,690 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:25,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:25,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1202515386, now seen corresponding path program 104 times [2021-06-12 22:14:25,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:25,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234117904] [2021-06-12 22:14:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:25,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:25,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234117904] [2021-06-12 22:14:25,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234117904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:25,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564758068] [2021-06-12 22:14:25,862 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:25,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:25,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:25,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:14:25,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:26,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564758068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:26,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:26,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-12 22:14:26,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531035357] [2021-06-12 22:14:26,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:14:26,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:26,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:14:26,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:14:26,165 INFO L87 Difference]: Start difference. First operand 44261 states and 128682 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 22:14:26,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:26,991 INFO L93 Difference]: Finished difference Result 61530 states and 178419 transitions. [2021-06-12 22:14:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:14:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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) Word has length 40 [2021-06-12 22:14:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:27,101 INFO L225 Difference]: With dead ends: 61530 [2021-06-12 22:14:27,101 INFO L226 Difference]: Without dead ends: 61492 [2021-06-12 22:14:27,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 580.1ms TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:14:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61492 states. [2021-06-12 22:14:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61492 to 44283. [2021-06-12 22:14:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44283 states, 44282 states have (on average 2.9074341718982883) internal successors, (128747), 44282 states have internal predecessors, (128747), 0 states have call successors, (0), 0 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 22:14:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44283 states to 44283 states and 128747 transitions. [2021-06-12 22:14:28,153 INFO L78 Accepts]: Start accepts. Automaton has 44283 states and 128747 transitions. Word has length 40 [2021-06-12 22:14:28,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:28,154 INFO L482 AbstractCegarLoop]: Abstraction has 44283 states and 128747 transitions. [2021-06-12 22:14:28,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 22:14:28,154 INFO L276 IsEmpty]: Start isEmpty. Operand 44283 states and 128747 transitions. [2021-06-12 22:14:28,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:28,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:28,210 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:28,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:28,410 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:28,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:28,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1556734402, now seen corresponding path program 105 times [2021-06-12 22:14:28,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:28,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593510599] [2021-06-12 22:14:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:28,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:28,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593510599] [2021-06-12 22:14:28,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593510599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:28,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003487034] [2021-06-12 22:14:28,559 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:28,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:14:28,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:28,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:14:28,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:28,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003487034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:28,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:28,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-12 22:14:28,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988879670] [2021-06-12 22:14:28,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:14:28,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:28,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:14:28,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:14:28,834 INFO L87 Difference]: Start difference. First operand 44283 states and 128747 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:14:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:29,674 INFO L93 Difference]: Finished difference Result 56563 states and 164364 transitions. [2021-06-12 22:14:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:14:29,674 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:29,775 INFO L225 Difference]: With dead ends: 56563 [2021-06-12 22:14:29,775 INFO L226 Difference]: Without dead ends: 56457 [2021-06-12 22:14:29,776 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:14:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56457 states. [2021-06-12 22:14:30,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56457 to 52795. [2021-06-12 22:14:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52795 states, 52794 states have (on average 2.919252187748608) internal successors, (154119), 52794 states have internal predecessors, (154119), 0 states have call successors, (0), 0 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 22:14:30,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52795 states to 52795 states and 154119 transitions. [2021-06-12 22:14:30,891 INFO L78 Accepts]: Start accepts. Automaton has 52795 states and 154119 transitions. Word has length 40 [2021-06-12 22:14:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:30,891 INFO L482 AbstractCegarLoop]: Abstraction has 52795 states and 154119 transitions. [2021-06-12 22:14:30,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:14:30,891 INFO L276 IsEmpty]: Start isEmpty. Operand 52795 states and 154119 transitions. [2021-06-12 22:14:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:30,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:30,983 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:31,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 22:14:31,184 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:31,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:31,184 INFO L82 PathProgramCache]: Analyzing trace with hash -280230338, now seen corresponding path program 106 times [2021-06-12 22:14:31,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:31,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861309869] [2021-06-12 22:14:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:31,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:31,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861309869] [2021-06-12 22:14:31,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861309869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:31,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702957841] [2021-06-12 22:14:31,322 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:31,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:31,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:31,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:14:31,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:31,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702957841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:31,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:31,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 22:14:31,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416138678] [2021-06-12 22:14:31,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:14:31,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:31,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:14:31,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:14:31,580 INFO L87 Difference]: Start difference. First operand 52795 states and 154119 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:14:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:32,096 INFO L93 Difference]: Finished difference Result 57562 states and 167245 transitions. [2021-06-12 22:14:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:14:32,096 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:32,422 INFO L225 Difference]: With dead ends: 57562 [2021-06-12 22:14:32,423 INFO L226 Difference]: Without dead ends: 57438 [2021-06-12 22:14:32,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 353.4ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:14:32,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57438 states. [2021-06-12 22:14:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57438 to 51595. [2021-06-12 22:14:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51595 states, 51594 states have (on average 2.9149319688335855) internal successors, (150393), 51594 states have internal predecessors, (150393), 0 states have call successors, (0), 0 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 22:14:33,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51595 states to 51595 states and 150393 transitions. [2021-06-12 22:14:33,280 INFO L78 Accepts]: Start accepts. Automaton has 51595 states and 150393 transitions. Word has length 40 [2021-06-12 22:14:33,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:33,280 INFO L482 AbstractCegarLoop]: Abstraction has 51595 states and 150393 transitions. [2021-06-12 22:14:33,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:14:33,280 INFO L276 IsEmpty]: Start isEmpty. Operand 51595 states and 150393 transitions. [2021-06-12 22:14:33,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:33,355 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:33,355 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:33,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:33,555 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:33,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:33,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1270374918, now seen corresponding path program 107 times [2021-06-12 22:14:33,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:33,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193874423] [2021-06-12 22:14:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:33,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:33,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193874423] [2021-06-12 22:14:33,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193874423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:33,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23682572] [2021-06-12 22:14:33,661 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:33,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:14:33,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:33,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:14:33,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:34,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23682572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:34,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:34,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 22:14:34,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362120798] [2021-06-12 22:14:34,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:14:34,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:34,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:14:34,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:14:34,152 INFO L87 Difference]: Start difference. First operand 51595 states and 150393 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:14:34,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:34,626 INFO L93 Difference]: Finished difference Result 55561 states and 161164 transitions. [2021-06-12 22:14:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:14:34,627 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:34,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:34,730 INFO L225 Difference]: With dead ends: 55561 [2021-06-12 22:14:34,730 INFO L226 Difference]: Without dead ends: 55437 [2021-06-12 22:14:34,730 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:14:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55437 states. [2021-06-12 22:14:35,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55437 to 50887. [2021-06-12 22:14:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50887 states, 50886 states have (on average 2.9142986283064105) internal successors, (148297), 50886 states have internal predecessors, (148297), 0 states have call successors, (0), 0 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 22:14:35,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50887 states to 50887 states and 148297 transitions. [2021-06-12 22:14:35,820 INFO L78 Accepts]: Start accepts. Automaton has 50887 states and 148297 transitions. Word has length 40 [2021-06-12 22:14:35,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:35,820 INFO L482 AbstractCegarLoop]: Abstraction has 50887 states and 148297 transitions. [2021-06-12 22:14:35,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:14:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 50887 states and 148297 transitions. [2021-06-12 22:14:35,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:35,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:35,877 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:36,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-12 22:14:36,079 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:36,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:36,079 INFO L82 PathProgramCache]: Analyzing trace with hash 626264254, now seen corresponding path program 108 times [2021-06-12 22:14:36,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:36,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134240951] [2021-06-12 22:14:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:36,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:36,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134240951] [2021-06-12 22:14:36,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134240951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:36,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279083742] [2021-06-12 22:14:36,194 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:36,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:14:36,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:36,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:14:36,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:36,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279083742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:36,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:36,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 22:14:36,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909550795] [2021-06-12 22:14:36,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:14:36,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:36,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:14:36,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:14:36,394 INFO L87 Difference]: Start difference. First operand 50887 states and 148297 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:14:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:37,146 INFO L93 Difference]: Finished difference Result 54386 states and 157811 transitions. [2021-06-12 22:14:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:14:37,151 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:37,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:37,274 INFO L225 Difference]: With dead ends: 54386 [2021-06-12 22:14:37,274 INFO L226 Difference]: Without dead ends: 54310 [2021-06-12 22:14:37,274 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 241.0ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:14:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54310 states. [2021-06-12 22:14:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54310 to 50291. [2021-06-12 22:14:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50291 states, 50290 states have (on average 2.913481805527938) internal successors, (146519), 50290 states have internal predecessors, (146519), 0 states have call successors, (0), 0 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 22:14:38,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50291 states to 50291 states and 146519 transitions. [2021-06-12 22:14:38,217 INFO L78 Accepts]: Start accepts. Automaton has 50291 states and 146519 transitions. Word has length 40 [2021-06-12 22:14:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:38,217 INFO L482 AbstractCegarLoop]: Abstraction has 50291 states and 146519 transitions. [2021-06-12 22:14:38,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:14:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 50291 states and 146519 transitions. [2021-06-12 22:14:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:38,275 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:38,275 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:38,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:38,476 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:38,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1839351558, now seen corresponding path program 109 times [2021-06-12 22:14:38,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:38,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542819358] [2021-06-12 22:14:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:38,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:38,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542819358] [2021-06-12 22:14:38,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542819358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:38,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372896171] [2021-06-12 22:14:38,628 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:38,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:14:38,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:39,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372896171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:39,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:39,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 22:14:39,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224431933] [2021-06-12 22:14:39,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:14:39,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:39,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:14:39,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:14:39,082 INFO L87 Difference]: Start difference. First operand 50291 states and 146519 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:14:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:39,471 INFO L93 Difference]: Finished difference Result 54366 states and 157749 transitions. [2021-06-12 22:14:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:14:39,472 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:39,562 INFO L225 Difference]: With dead ends: 54366 [2021-06-12 22:14:39,563 INFO L226 Difference]: Without dead ends: 54290 [2021-06-12 22:14:39,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 259.6ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:14:39,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54290 states. [2021-06-12 22:14:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54290 to 50899. [2021-06-12 22:14:40,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50899 states, 50898 states have (on average 2.913945538135094) internal successors, (148314), 50898 states have internal predecessors, (148314), 0 states have call successors, (0), 0 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 22:14:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50899 states to 50899 states and 148314 transitions. [2021-06-12 22:14:40,623 INFO L78 Accepts]: Start accepts. Automaton has 50899 states and 148314 transitions. Word has length 40 [2021-06-12 22:14:40,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:40,623 INFO L482 AbstractCegarLoop]: Abstraction has 50899 states and 148314 transitions. [2021-06-12 22:14:40,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:14:40,623 INFO L276 IsEmpty]: Start isEmpty. Operand 50899 states and 148314 transitions. [2021-06-12 22:14:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:40,681 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:40,681 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:40,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:40,885 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:40,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:40,885 INFO L82 PathProgramCache]: Analyzing trace with hash 665879302, now seen corresponding path program 110 times [2021-06-12 22:14:40,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:40,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971975261] [2021-06-12 22:14:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:41,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:41,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971975261] [2021-06-12 22:14:41,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971975261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:41,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813326073] [2021-06-12 22:14:41,037 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:41,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:41,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:41,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:14:41,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:41,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813326073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:41,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:41,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-12 22:14:41,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073129030] [2021-06-12 22:14:41,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:14:41,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:41,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:14:41,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:14:41,281 INFO L87 Difference]: Start difference. First operand 50899 states and 148314 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 22:14:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:42,205 INFO L93 Difference]: Finished difference Result 57635 states and 168077 transitions. [2021-06-12 22:14:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:14:42,206 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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) Word has length 40 [2021-06-12 22:14:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:42,308 INFO L225 Difference]: With dead ends: 57635 [2021-06-12 22:14:42,308 INFO L226 Difference]: Without dead ends: 57513 [2021-06-12 22:14:42,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 518.2ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:14:42,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57513 states. [2021-06-12 22:14:43,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57513 to 56897. [2021-06-12 22:14:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56897 states, 56896 states have (on average 2.92415987064117) internal successors, (166373), 56896 states have internal predecessors, (166373), 0 states have call successors, (0), 0 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 22:14:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56897 states to 56897 states and 166373 transitions. [2021-06-12 22:14:43,412 INFO L78 Accepts]: Start accepts. Automaton has 56897 states and 166373 transitions. Word has length 40 [2021-06-12 22:14:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:43,412 INFO L482 AbstractCegarLoop]: Abstraction has 56897 states and 166373 transitions. [2021-06-12 22:14:43,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 22:14:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 56897 states and 166373 transitions. [2021-06-12 22:14:43,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:43,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:43,486 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:43,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:43,689 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:43,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:43,689 INFO L82 PathProgramCache]: Analyzing trace with hash -557051134, now seen corresponding path program 111 times [2021-06-12 22:14:43,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:43,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769342506] [2021-06-12 22:14:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:43,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:43,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769342506] [2021-06-12 22:14:43,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769342506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:43,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941236916] [2021-06-12 22:14:43,782 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:43,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 22:14:43,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:43,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:14:43,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:43,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941236916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:43,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:43,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 22:14:43,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736450190] [2021-06-12 22:14:43,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:14:43,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:43,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:14:43,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:14:43,996 INFO L87 Difference]: Start difference. First operand 56897 states and 166373 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:14:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:44,677 INFO L93 Difference]: Finished difference Result 58288 states and 170073 transitions. [2021-06-12 22:14:44,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:14:44,677 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:44,775 INFO L225 Difference]: With dead ends: 58288 [2021-06-12 22:14:44,775 INFO L226 Difference]: Without dead ends: 58158 [2021-06-12 22:14:44,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:14:44,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58158 states. [2021-06-12 22:14:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58158 to 52473. [2021-06-12 22:14:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52473 states, 52472 states have (on average 2.9211579509071504) internal successors, (153279), 52472 states have internal predecessors, (153279), 0 states have call successors, (0), 0 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 22:14:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52473 states to 52473 states and 153279 transitions. [2021-06-12 22:14:45,900 INFO L78 Accepts]: Start accepts. Automaton has 52473 states and 153279 transitions. Word has length 40 [2021-06-12 22:14:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:45,900 INFO L482 AbstractCegarLoop]: Abstraction has 52473 states and 153279 transitions. [2021-06-12 22:14:45,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:14:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 52473 states and 153279 transitions. [2021-06-12 22:14:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:45,978 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:45,978 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:46,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-12 22:14:46,179 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:46,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:46,179 INFO L82 PathProgramCache]: Analyzing trace with hash -161255976, now seen corresponding path program 112 times [2021-06-12 22:14:46,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:46,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989837873] [2021-06-12 22:14:46,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:46,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:46,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989837873] [2021-06-12 22:14:46,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989837873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:46,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386612007] [2021-06-12 22:14:46,279 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:46,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:46,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:46,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:14:46,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:46,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386612007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:46,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:46,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 22:14:46,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348705559] [2021-06-12 22:14:46,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:14:46,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:46,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:14:46,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:14:46,496 INFO L87 Difference]: Start difference. First operand 52473 states and 153279 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:14:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:47,103 INFO L93 Difference]: Finished difference Result 53321 states and 155327 transitions. [2021-06-12 22:14:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:14:47,104 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:47,193 INFO L225 Difference]: With dead ends: 53321 [2021-06-12 22:14:47,193 INFO L226 Difference]: Without dead ends: 53204 [2021-06-12 22:14:47,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:14:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53204 states. [2021-06-12 22:14:47,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53204 to 51075. [2021-06-12 22:14:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51075 states, 51074 states have (on average 2.920350863453029) internal successors, (149154), 51074 states have internal predecessors, (149154), 0 states have call successors, (0), 0 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 22:14:48,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51075 states to 51075 states and 149154 transitions. [2021-06-12 22:14:48,284 INFO L78 Accepts]: Start accepts. Automaton has 51075 states and 149154 transitions. Word has length 40 [2021-06-12 22:14:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:48,284 INFO L482 AbstractCegarLoop]: Abstraction has 51075 states and 149154 transitions. [2021-06-12 22:14:48,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:14:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 51075 states and 149154 transitions. [2021-06-12 22:14:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:48,355 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:48,355 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:48,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:48,569 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:48,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:48,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2036427680, now seen corresponding path program 113 times [2021-06-12 22:14:48,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:48,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792301748] [2021-06-12 22:14:48,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:48,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:48,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792301748] [2021-06-12 22:14:48,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792301748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:48,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160982246] [2021-06-12 22:14:48,699 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:48,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:14:48,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:48,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:14:48,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:48,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160982246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:48,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:48,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 22:14:48,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898345599] [2021-06-12 22:14:48,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:14:48,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:48,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:14:48,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:14:48,961 INFO L87 Difference]: Start difference. First operand 51075 states and 149154 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:14:49,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:49,354 INFO L93 Difference]: Finished difference Result 53291 states and 155408 transitions. [2021-06-12 22:14:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:14:49,355 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:49,448 INFO L225 Difference]: With dead ends: 53291 [2021-06-12 22:14:49,448 INFO L226 Difference]: Without dead ends: 53215 [2021-06-12 22:14:49,448 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:14:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53215 states. [2021-06-12 22:14:50,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53215 to 50481. [2021-06-12 22:14:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50481 states, 50480 states have (on average 2.9226426307448494) internal successors, (147535), 50480 states have internal predecessors, (147535), 0 states have call successors, (0), 0 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 22:14:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50481 states to 50481 states and 147535 transitions. [2021-06-12 22:14:50,467 INFO L78 Accepts]: Start accepts. Automaton has 50481 states and 147535 transitions. Word has length 40 [2021-06-12 22:14:50,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:50,467 INFO L482 AbstractCegarLoop]: Abstraction has 50481 states and 147535 transitions. [2021-06-12 22:14:50,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:14:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 50481 states and 147535 transitions. [2021-06-12 22:14:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:50,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:50,528 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:50,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:50,729 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:50,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:50,729 INFO L82 PathProgramCache]: Analyzing trace with hash -711983976, now seen corresponding path program 114 times [2021-06-12 22:14:50,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:50,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729904037] [2021-06-12 22:14:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:14:50,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:50,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729904037] [2021-06-12 22:14:50,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729904037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:50,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949971172] [2021-06-12 22:14:50,869 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:50,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:14:50,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:50,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:14:50,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:51,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949971172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:51,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:51,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 22:14:51,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296565729] [2021-06-12 22:14:51,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:14:51,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:51,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:14:51,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:14:51,106 INFO L87 Difference]: Start difference. First operand 50481 states and 147535 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:14:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:51,634 INFO L93 Difference]: Finished difference Result 51763 states and 151105 transitions. [2021-06-12 22:14:51,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:14:51,634 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:51,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:51,728 INFO L225 Difference]: With dead ends: 51763 [2021-06-12 22:14:51,728 INFO L226 Difference]: Without dead ends: 51687 [2021-06-12 22:14:51,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:14:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51687 states. [2021-06-12 22:14:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51687 to 51357. [2021-06-12 22:14:52,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51357 states, 51356 states have (on average 2.924429472700366) internal successors, (150187), 51356 states have internal predecessors, (150187), 0 states have call successors, (0), 0 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 22:14:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51357 states to 51357 states and 150187 transitions. [2021-06-12 22:14:52,883 INFO L78 Accepts]: Start accepts. Automaton has 51357 states and 150187 transitions. Word has length 40 [2021-06-12 22:14:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:52,883 INFO L482 AbstractCegarLoop]: Abstraction has 51357 states and 150187 transitions. [2021-06-12 22:14:52,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:14:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 51357 states and 150187 transitions. [2021-06-12 22:14:52,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:52,938 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:52,938 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:53,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-12 22:14:53,139 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:53,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:53,139 INFO L82 PathProgramCache]: Analyzing trace with hash 748763352, now seen corresponding path program 115 times [2021-06-12 22:14:53,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:53,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154175979] [2021-06-12 22:14:53,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:53,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:53,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154175979] [2021-06-12 22:14:53,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154175979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:53,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841717617] [2021-06-12 22:14:53,277 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:53,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:14:53,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:53,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841717617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:53,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:53,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 22:14:53,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819068662] [2021-06-12 22:14:53,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:14:53,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:53,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:14:53,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:14:53,512 INFO L87 Difference]: Start difference. First operand 51357 states and 150187 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:14:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:54,102 INFO L93 Difference]: Finished difference Result 51807 states and 151188 transitions. [2021-06-12 22:14:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:14:54,103 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:54,182 INFO L225 Difference]: With dead ends: 51807 [2021-06-12 22:14:54,182 INFO L226 Difference]: Without dead ends: 51731 [2021-06-12 22:14:54,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 284.6ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:14:54,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51731 states. [2021-06-12 22:14:54,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51731 to 51351. [2021-06-12 22:14:54,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51351 states, 51350 states have (on average 2.924479065238559) internal successors, (150172), 51350 states have internal predecessors, (150172), 0 states have call successors, (0), 0 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 22:14:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51351 states to 51351 states and 150172 transitions. [2021-06-12 22:14:55,031 INFO L78 Accepts]: Start accepts. Automaton has 51351 states and 150172 transitions. Word has length 40 [2021-06-12 22:14:55,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:55,031 INFO L482 AbstractCegarLoop]: Abstraction has 51351 states and 150172 transitions. [2021-06-12 22:14:55,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:14:55,031 INFO L276 IsEmpty]: Start isEmpty. Operand 51351 states and 150172 transitions. [2021-06-12 22:14:55,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:55,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:55,088 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:55,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-12 22:14:55,288 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:55,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:55,289 INFO L82 PathProgramCache]: Analyzing trace with hash -960067266, now seen corresponding path program 116 times [2021-06-12 22:14:55,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:55,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80491564] [2021-06-12 22:14:55,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:55,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:55,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80491564] [2021-06-12 22:14:55,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80491564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:55,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602053302] [2021-06-12 22:14:55,713 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:55,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:55,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:55,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:14:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:55,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602053302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:55,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:55,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-12 22:14:55,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252617931] [2021-06-12 22:14:55,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:14:55,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:55,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:14:55,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:14:55,985 INFO L87 Difference]: Start difference. First operand 51351 states and 150172 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 22:14:56,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:56,682 INFO L93 Difference]: Finished difference Result 60681 states and 177304 transitions. [2021-06-12 22:14:56,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:14:56,683 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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) Word has length 40 [2021-06-12 22:14:56,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:56,790 INFO L225 Difference]: With dead ends: 60681 [2021-06-12 22:14:56,790 INFO L226 Difference]: Without dead ends: 60579 [2021-06-12 22:14:56,790 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 787.8ms TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:14:57,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60579 states. [2021-06-12 22:14:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60579 to 60113. [2021-06-12 22:14:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60113 states, 60112 states have (on average 2.927751530476444) internal successors, (175993), 60112 states have internal predecessors, (175993), 0 states have call successors, (0), 0 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 22:14:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60113 states to 60113 states and 175993 transitions. [2021-06-12 22:14:58,172 INFO L78 Accepts]: Start accepts. Automaton has 60113 states and 175993 transitions. Word has length 40 [2021-06-12 22:14:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:58,172 INFO L482 AbstractCegarLoop]: Abstraction has 60113 states and 175993 transitions. [2021-06-12 22:14:58,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 22:14:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 60113 states and 175993 transitions. [2021-06-12 22:14:58,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:14:58,276 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:58,276 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:58,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-12 22:14:58,476 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:58,477 INFO L82 PathProgramCache]: Analyzing trace with hash -988176450, now seen corresponding path program 117 times [2021-06-12 22:14:58,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:58,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54780129] [2021-06-12 22:14:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:58,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:58,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54780129] [2021-06-12 22:14:58,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54780129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:58,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936036277] [2021-06-12 22:14:58,557 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:58,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:14:58,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:58,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:14:58,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:58,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936036277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:58,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:58,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-12 22:14:58,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733824978] [2021-06-12 22:14:58,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:14:58,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:58,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:14:58,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:14:58,794 INFO L87 Difference]: Start difference. First operand 60113 states and 175993 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:14:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:59,149 INFO L93 Difference]: Finished difference Result 60823 states and 177836 transitions. [2021-06-12 22:14:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:14:59,149 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 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 40 [2021-06-12 22:14:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:59,258 INFO L225 Difference]: With dead ends: 60823 [2021-06-12 22:14:59,258 INFO L226 Difference]: Without dead ends: 60707 [2021-06-12 22:14:59,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:14:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60707 states. [2021-06-12 22:15:00,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60707 to 60113. [2021-06-12 22:15:00,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60113 states, 60112 states have (on average 2.9261212403513444) internal successors, (175895), 60112 states have internal predecessors, (175895), 0 states have call successors, (0), 0 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 22:15:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60113 states to 60113 states and 175895 transitions. [2021-06-12 22:15:00,515 INFO L78 Accepts]: Start accepts. Automaton has 60113 states and 175895 transitions. Word has length 40 [2021-06-12 22:15:00,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:00,515 INFO L482 AbstractCegarLoop]: Abstraction has 60113 states and 175895 transitions. [2021-06-12 22:15:00,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:15:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 60113 states and 175895 transitions. [2021-06-12 22:15:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:00,823 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:00,823 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:01,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-12 22:15:01,037 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:01,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:01,037 INFO L82 PathProgramCache]: Analyzing trace with hash -851969850, now seen corresponding path program 118 times [2021-06-12 22:15:01,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:01,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609058195] [2021-06-12 22:15:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:01,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:01,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609058195] [2021-06-12 22:15:01,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609058195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:01,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492577771] [2021-06-12 22:15:01,138 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:01,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:15:01,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:01,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:01,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:01,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492577771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:01,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:01,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 22:15:01,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579101172] [2021-06-12 22:15:01,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:15:01,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:01,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:15:01,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:15:01,376 INFO L87 Difference]: Start difference. First operand 60113 states and 175895 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:15:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:01,857 INFO L93 Difference]: Finished difference Result 64142 states and 187437 transitions. [2021-06-12 22:15:01,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:15:01,857 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:01,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:01,982 INFO L225 Difference]: With dead ends: 64142 [2021-06-12 22:15:01,982 INFO L226 Difference]: Without dead ends: 64018 [2021-06-12 22:15:01,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:15:02,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64018 states. [2021-06-12 22:15:03,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64018 to 63541. [2021-06-12 22:15:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63541 states, 63540 states have (on average 2.9268334907145106) internal successors, (185971), 63540 states have internal predecessors, (185971), 0 states have call successors, (0), 0 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 22:15:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63541 states to 63541 states and 185971 transitions. [2021-06-12 22:15:03,533 INFO L78 Accepts]: Start accepts. Automaton has 63541 states and 185971 transitions. Word has length 40 [2021-06-12 22:15:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:03,533 INFO L482 AbstractCegarLoop]: Abstraction has 63541 states and 185971 transitions. [2021-06-12 22:15:03,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:15:03,533 INFO L276 IsEmpty]: Start isEmpty. Operand 63541 states and 185971 transitions. [2021-06-12 22:15:03,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:03,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:03,648 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:03,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:03,849 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:03,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:03,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2140494270, now seen corresponding path program 119 times [2021-06-12 22:15:03,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:03,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450389830] [2021-06-12 22:15:03,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:15:03,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:03,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450389830] [2021-06-12 22:15:03,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450389830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:03,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011376026] [2021-06-12 22:15:03,949 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:03,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:15:03,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:03,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:03,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:04,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011376026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:04,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:04,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 22:15:04,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41257035] [2021-06-12 22:15:04,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:15:04,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:04,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:15:04,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:15:04,190 INFO L87 Difference]: Start difference. First operand 63541 states and 185971 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 22:15:04,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:04,635 INFO L93 Difference]: Finished difference Result 67150 states and 196442 transitions. [2021-06-12 22:15:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:15:04,635 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:05,014 INFO L225 Difference]: With dead ends: 67150 [2021-06-12 22:15:05,014 INFO L226 Difference]: Without dead ends: 67019 [2021-06-12 22:15:05,014 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:15:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67019 states. [2021-06-12 22:15:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67019 to 66567. [2021-06-12 22:15:06,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66567 states, 66566 states have (on average 2.929483520115374) internal successors, (195004), 66566 states have internal predecessors, (195004), 0 states have call successors, (0), 0 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 22:15:06,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66567 states to 66567 states and 195004 transitions. [2021-06-12 22:15:06,383 INFO L78 Accepts]: Start accepts. Automaton has 66567 states and 195004 transitions. Word has length 40 [2021-06-12 22:15:06,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:06,383 INFO L482 AbstractCegarLoop]: Abstraction has 66567 states and 195004 transitions. [2021-06-12 22:15:06,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 22:15:06,383 INFO L276 IsEmpty]: Start isEmpty. Operand 66567 states and 195004 transitions. [2021-06-12 22:15:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:06,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:06,494 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:06,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:06,695 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:06,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1155037826, now seen corresponding path program 120 times [2021-06-12 22:15:06,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:06,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302061841] [2021-06-12 22:15:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:06,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:06,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302061841] [2021-06-12 22:15:06,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302061841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:06,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019680054] [2021-06-12 22:15:06,833 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:06,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:15:06,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:06,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:06,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:07,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019680054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:07,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:07,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 22:15:07,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368209295] [2021-06-12 22:15:07,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:15:07,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:07,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:15:07,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:15:07,084 INFO L87 Difference]: Start difference. First operand 66567 states and 195004 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:15:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:07,900 INFO L93 Difference]: Finished difference Result 67138 states and 196301 transitions. [2021-06-12 22:15:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:15:07,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:08,028 INFO L225 Difference]: With dead ends: 67138 [2021-06-12 22:15:08,028 INFO L226 Difference]: Without dead ends: 67008 [2021-06-12 22:15:08,029 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 291.1ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:15:08,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67008 states. [2021-06-12 22:15:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67008 to 66551. [2021-06-12 22:15:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66551 states, 66550 states have (on average 2.929526671675432) internal successors, (194960), 66550 states have internal predecessors, (194960), 0 states have call successors, (0), 0 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 22:15:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66551 states to 66551 states and 194960 transitions. [2021-06-12 22:15:09,325 INFO L78 Accepts]: Start accepts. Automaton has 66551 states and 194960 transitions. Word has length 40 [2021-06-12 22:15:09,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:09,325 INFO L482 AbstractCegarLoop]: Abstraction has 66551 states and 194960 transitions. [2021-06-12 22:15:09,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:15:09,325 INFO L276 IsEmpty]: Start isEmpty. Operand 66551 states and 194960 transitions. [2021-06-12 22:15:09,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:09,423 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:09,423 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:09,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:09,624 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:09,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2930118, now seen corresponding path program 121 times [2021-06-12 22:15:09,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:09,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208395367] [2021-06-12 22:15:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:15:09,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:09,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208395367] [2021-06-12 22:15:09,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208395367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:09,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048184487] [2021-06-12 22:15:09,733 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:09,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:09,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:10,171 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-12 22:15:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:10,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048184487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:10,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:10,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 22:15:10,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308909443] [2021-06-12 22:15:10,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:15:10,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:10,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:15:10,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:15:10,298 INFO L87 Difference]: Start difference. First operand 66551 states and 194960 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 22:15:10,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:10,724 INFO L93 Difference]: Finished difference Result 68643 states and 200950 transitions. [2021-06-12 22:15:10,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:15:10,724 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:10,844 INFO L225 Difference]: With dead ends: 68643 [2021-06-12 22:15:10,844 INFO L226 Difference]: Without dead ends: 68519 [2021-06-12 22:15:10,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 549.0ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:15:10,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68519 states. [2021-06-12 22:15:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68519 to 68109. [2021-06-12 22:15:12,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68109 states, 68108 states have (on average 2.9315352087860456) internal successors, (199661), 68108 states have internal predecessors, (199661), 0 states have call successors, (0), 0 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 22:15:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68109 states to 68109 states and 199661 transitions. [2021-06-12 22:15:12,480 INFO L78 Accepts]: Start accepts. Automaton has 68109 states and 199661 transitions. Word has length 40 [2021-06-12 22:15:12,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:12,480 INFO L482 AbstractCegarLoop]: Abstraction has 68109 states and 199661 transitions. [2021-06-12 22:15:12,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 22:15:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 68109 states and 199661 transitions. [2021-06-12 22:15:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:12,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:12,603 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:12,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-12 22:15:12,827 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:12,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:12,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1002365318, now seen corresponding path program 122 times [2021-06-12 22:15:12,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:12,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189828821] [2021-06-12 22:15:12,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:15:12,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:12,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189828821] [2021-06-12 22:15:12,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189828821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:12,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55027374] [2021-06-12 22:15:12,949 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:12,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:15:12,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:12,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:12,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:13,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55027374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:13,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:13,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 22:15:13,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563499549] [2021-06-12 22:15:13,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:15:13,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:13,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:15:13,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:15:13,545 INFO L87 Difference]: Start difference. First operand 68109 states and 199661 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 22:15:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:14,078 INFO L93 Difference]: Finished difference Result 68644 states and 200867 transitions. [2021-06-12 22:15:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:15:14,078 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:14,208 INFO L225 Difference]: With dead ends: 68644 [2021-06-12 22:15:14,208 INFO L226 Difference]: Without dead ends: 68514 [2021-06-12 22:15:14,209 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:15:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68514 states. [2021-06-12 22:15:15,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68514 to 68093. [2021-06-12 22:15:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68093 states, 68092 states have (on average 2.9315778652411444) internal successors, (199617), 68092 states have internal predecessors, (199617), 0 states have call successors, (0), 0 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 22:15:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68093 states to 68093 states and 199617 transitions. [2021-06-12 22:15:15,892 INFO L78 Accepts]: Start accepts. Automaton has 68093 states and 199617 transitions. Word has length 40 [2021-06-12 22:15:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:15,892 INFO L482 AbstractCegarLoop]: Abstraction has 68093 states and 199617 transitions. [2021-06-12 22:15:15,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 22:15:15,893 INFO L276 IsEmpty]: Start isEmpty. Operand 68093 states and 199617 transitions. [2021-06-12 22:15:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:15,996 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:15,996 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:16,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:16,196 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1831854650, now seen corresponding path program 123 times [2021-06-12 22:15:16,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:16,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746774592] [2021-06-12 22:15:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:16,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:16,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746774592] [2021-06-12 22:15:16,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746774592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:16,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792388201] [2021-06-12 22:15:16,342 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:16,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:15:16,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:16,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:16,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:16,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792388201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:16,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:16,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:15:16,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728078467] [2021-06-12 22:15:16,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:15:16,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:16,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:15:16,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:15:16,648 INFO L87 Difference]: Start difference. First operand 68093 states and 199617 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:15:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:17,439 INFO L93 Difference]: Finished difference Result 68603 states and 200761 transitions. [2021-06-12 22:15:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:15:17,439 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:17,567 INFO L225 Difference]: With dead ends: 68603 [2021-06-12 22:15:17,568 INFO L226 Difference]: Without dead ends: 68527 [2021-06-12 22:15:17,568 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 343.1ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:15:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68527 states. [2021-06-12 22:15:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68527 to 68087. [2021-06-12 22:15:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68087 states, 68086 states have (on average 2.9316158975413447) internal successors, (199602), 68086 states have internal predecessors, (199602), 0 states have call successors, (0), 0 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 22:15:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68087 states to 68087 states and 199602 transitions. [2021-06-12 22:15:18,885 INFO L78 Accepts]: Start accepts. Automaton has 68087 states and 199602 transitions. Word has length 40 [2021-06-12 22:15:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:18,885 INFO L482 AbstractCegarLoop]: Abstraction has 68087 states and 199602 transitions. [2021-06-12 22:15:18,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:15:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 68087 states and 199602 transitions. [2021-06-12 22:15:18,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:18,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:18,981 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:19,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-12 22:15:19,182 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:19,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:19,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1497503238, now seen corresponding path program 124 times [2021-06-12 22:15:19,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:19,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491577494] [2021-06-12 22:15:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:19,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:19,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491577494] [2021-06-12 22:15:19,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491577494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:19,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264966451] [2021-06-12 22:15:19,336 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:19,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:15:19,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:19,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:19,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:19,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264966451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:19,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:19,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-12 22:15:19,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121006392] [2021-06-12 22:15:19,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:15:19,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:19,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:15:19,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:15:19,767 INFO L87 Difference]: Start difference. First operand 68087 states and 199602 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:15:20,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:20,277 INFO L93 Difference]: Finished difference Result 90862 states and 266329 transitions. [2021-06-12 22:15:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:15:20,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:20,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:20,448 INFO L225 Difference]: With dead ends: 90862 [2021-06-12 22:15:20,448 INFO L226 Difference]: Without dead ends: 90825 [2021-06-12 22:15:20,448 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:15:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90825 states. [2021-06-12 22:15:21,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90825 to 68095. [2021-06-12 22:15:21,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68095 states, 68094 states have (on average 2.931565189297148) internal successors, (199622), 68094 states have internal predecessors, (199622), 0 states have call successors, (0), 0 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 22:15:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68095 states to 68095 states and 199622 transitions. [2021-06-12 22:15:22,258 INFO L78 Accepts]: Start accepts. Automaton has 68095 states and 199622 transitions. Word has length 40 [2021-06-12 22:15:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:22,258 INFO L482 AbstractCegarLoop]: Abstraction has 68095 states and 199622 transitions. [2021-06-12 22:15:22,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:15:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 68095 states and 199622 transitions. [2021-06-12 22:15:22,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:22,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:22,356 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:22,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:22,557 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:22,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:22,557 INFO L82 PathProgramCache]: Analyzing trace with hash -627011198, now seen corresponding path program 125 times [2021-06-12 22:15:22,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:22,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873322857] [2021-06-12 22:15:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:22,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:22,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873322857] [2021-06-12 22:15:22,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873322857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:22,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692138335] [2021-06-12 22:15:22,700 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:22,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:15:22,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:22,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:22,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:22,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692138335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:22,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:22,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 22:15:22,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244644386] [2021-06-12 22:15:22,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:15:22,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:22,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:15:22,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:15:22,921 INFO L87 Difference]: Start difference. First operand 68095 states and 199622 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:15:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:23,637 INFO L93 Difference]: Finished difference Result 90806 states and 266237 transitions. [2021-06-12 22:15:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:15:23,637 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:23,813 INFO L225 Difference]: With dead ends: 90806 [2021-06-12 22:15:23,814 INFO L226 Difference]: Without dead ends: 90769 [2021-06-12 22:15:23,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 255.1ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:15:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90769 states. [2021-06-12 22:15:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90769 to 68117. [2021-06-12 22:15:25,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68117 states, 68116 states have (on average 2.9315726114275646) internal successors, (199687), 68116 states have internal predecessors, (199687), 0 states have call successors, (0), 0 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 22:15:25,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68117 states to 68117 states and 199687 transitions. [2021-06-12 22:15:25,250 INFO L78 Accepts]: Start accepts. Automaton has 68117 states and 199687 transitions. Word has length 40 [2021-06-12 22:15:25,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:25,251 INFO L482 AbstractCegarLoop]: Abstraction has 68117 states and 199687 transitions. [2021-06-12 22:15:25,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:15:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 68117 states and 199687 transitions. [2021-06-12 22:15:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:25,344 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:25,344 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:25,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:25,545 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:25,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:25,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2073309766, now seen corresponding path program 126 times [2021-06-12 22:15:25,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:25,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245677650] [2021-06-12 22:15:25,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:26,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:26,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245677650] [2021-06-12 22:15:26,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245677650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:26,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893909860] [2021-06-12 22:15:26,034 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:26,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:15:26,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:26,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:15:26,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:26,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893909860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:26,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:26,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-12 22:15:26,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422121052] [2021-06-12 22:15:26,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:15:26,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:26,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:15:26,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:15:26,273 INFO L87 Difference]: Start difference. First operand 68117 states and 199687 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 22:15:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:27,445 INFO L93 Difference]: Finished difference Result 92902 states and 271948 transitions. [2021-06-12 22:15:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:15:27,446 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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) Word has length 40 [2021-06-12 22:15:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:27,593 INFO L225 Difference]: With dead ends: 92902 [2021-06-12 22:15:27,594 INFO L226 Difference]: Without dead ends: 92828 [2021-06-12 22:15:27,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 566.6ms TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:15:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92828 states. [2021-06-12 22:15:28,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92828 to 69669. [2021-06-12 22:15:28,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69669 states, 69668 states have (on average 2.9318338405006603) internal successors, (204255), 69668 states have internal predecessors, (204255), 0 states have call successors, (0), 0 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 22:15:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69669 states to 69669 states and 204255 transitions. [2021-06-12 22:15:29,009 INFO L78 Accepts]: Start accepts. Automaton has 69669 states and 204255 transitions. Word has length 40 [2021-06-12 22:15:29,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:29,009 INFO L482 AbstractCegarLoop]: Abstraction has 69669 states and 204255 transitions. [2021-06-12 22:15:29,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 22:15:29,009 INFO L276 IsEmpty]: Start isEmpty. Operand 69669 states and 204255 transitions. [2021-06-12 22:15:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:29,099 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:29,099 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:29,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:29,300 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:29,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1408085314, now seen corresponding path program 127 times [2021-06-12 22:15:29,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:29,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517373816] [2021-06-12 22:15:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:29,590 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-12 22:15:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:29,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:29,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517373816] [2021-06-12 22:15:29,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517373816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:29,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147221394] [2021-06-12 22:15:29,754 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:29,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:29,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:29,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147221394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:29,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:29,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 22:15:29,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150835684] [2021-06-12 22:15:29,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:15:29,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:29,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:15:29,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:15:29,991 INFO L87 Difference]: Start difference. First operand 69669 states and 204255 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:15:30,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:30,606 INFO L93 Difference]: Finished difference Result 95491 states and 279885 transitions. [2021-06-12 22:15:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:15:30,606 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:30,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:31,061 INFO L225 Difference]: With dead ends: 95491 [2021-06-12 22:15:31,062 INFO L226 Difference]: Without dead ends: 95385 [2021-06-12 22:15:31,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 292.8ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:15:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95385 states. [2021-06-12 22:15:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95385 to 72491. [2021-06-12 22:15:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72491 states, 72490 states have (on average 2.932487239619258) internal successors, (212576), 72490 states have internal predecessors, (212576), 0 states have call successors, (0), 0 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 22:15:32,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72491 states to 72491 states and 212576 transitions. [2021-06-12 22:15:32,463 INFO L78 Accepts]: Start accepts. Automaton has 72491 states and 212576 transitions. Word has length 40 [2021-06-12 22:15:32,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:32,463 INFO L482 AbstractCegarLoop]: Abstraction has 72491 states and 212576 transitions. [2021-06-12 22:15:32,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:15:32,464 INFO L276 IsEmpty]: Start isEmpty. Operand 72491 states and 212576 transitions. [2021-06-12 22:15:32,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:32,564 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:32,564 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:32,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-12 22:15:32,765 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:32,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:32,765 INFO L82 PathProgramCache]: Analyzing trace with hash -346917946, now seen corresponding path program 128 times [2021-06-12 22:15:32,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:32,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520057090] [2021-06-12 22:15:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:32,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:32,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520057090] [2021-06-12 22:15:32,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520057090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:32,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784259143] [2021-06-12 22:15:32,893 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:32,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:15:32,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:32,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:15:32,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:33,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784259143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:33,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:33,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-12 22:15:33,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978041645] [2021-06-12 22:15:33,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:15:33,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:33,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:15:33,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:15:33,447 INFO L87 Difference]: Start difference. First operand 72491 states and 212576 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 22:15:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:34,795 INFO L93 Difference]: Finished difference Result 100288 states and 293712 transitions. [2021-06-12 22:15:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:15:34,796 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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) Word has length 40 [2021-06-12 22:15:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:34,973 INFO L225 Difference]: With dead ends: 100288 [2021-06-12 22:15:34,973 INFO L226 Difference]: Without dead ends: 100151 [2021-06-12 22:15:34,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 675.8ms TimeCoverageRelationStatistics Valid=196, Invalid=1874, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:15:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100151 states. [2021-06-12 22:15:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100151 to 73759. [2021-06-12 22:15:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73759 states, 73758 states have (on average 2.9331597928360313) internal successors, (216344), 73758 states have internal predecessors, (216344), 0 states have call successors, (0), 0 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 22:15:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73759 states to 73759 states and 216344 transitions. [2021-06-12 22:15:36,813 INFO L78 Accepts]: Start accepts. Automaton has 73759 states and 216344 transitions. Word has length 40 [2021-06-12 22:15:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:36,813 INFO L482 AbstractCegarLoop]: Abstraction has 73759 states and 216344 transitions. [2021-06-12 22:15:36,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 22:15:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 73759 states and 216344 transitions. [2021-06-12 22:15:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:36,925 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:36,925 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:37,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-12 22:15:37,134 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:37,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:37,134 INFO L82 PathProgramCache]: Analyzing trace with hash -2017252144, now seen corresponding path program 129 times [2021-06-12 22:15:37,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:37,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039030377] [2021-06-12 22:15:37,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:37,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:37,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039030377] [2021-06-12 22:15:37,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039030377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:37,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249098279] [2021-06-12 22:15:37,273 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:37,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:15:37,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:37,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:37,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:37,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249098279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:37,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:37,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 22:15:37,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750559420] [2021-06-12 22:15:37,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:15:37,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:37,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:15:37,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:15:37,500 INFO L87 Difference]: Start difference. First operand 73759 states and 216344 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:15:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:38,285 INFO L93 Difference]: Finished difference Result 78859 states and 230387 transitions. [2021-06-12 22:15:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:15:38,285 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:38,425 INFO L225 Difference]: With dead ends: 78859 [2021-06-12 22:15:38,426 INFO L226 Difference]: Without dead ends: 78785 [2021-06-12 22:15:38,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:15:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78785 states. [2021-06-12 22:15:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78785 to 75025. [2021-06-12 22:15:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75025 states, 75024 states have (on average 2.9336612284069097) internal successors, (220095), 75024 states have internal predecessors, (220095), 0 states have call successors, (0), 0 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 22:15:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75025 states to 75025 states and 220095 transitions. [2021-06-12 22:15:39,879 INFO L78 Accepts]: Start accepts. Automaton has 75025 states and 220095 transitions. Word has length 40 [2021-06-12 22:15:39,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:39,879 INFO L482 AbstractCegarLoop]: Abstraction has 75025 states and 220095 transitions. [2021-06-12 22:15:39,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:15:39,879 INFO L276 IsEmpty]: Start isEmpty. Operand 75025 states and 220095 transitions. [2021-06-12 22:15:40,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:40,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:40,005 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:40,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-12 22:15:40,206 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:40,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:40,206 INFO L82 PathProgramCache]: Analyzing trace with hash -727268640, now seen corresponding path program 130 times [2021-06-12 22:15:40,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:40,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140321196] [2021-06-12 22:15:40,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:40,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:40,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140321196] [2021-06-12 22:15:40,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140321196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:40,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312344454] [2021-06-12 22:15:40,716 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:40,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:15:40,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:40,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:40,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:40,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312344454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:40,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:40,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 22:15:40,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846809712] [2021-06-12 22:15:40,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:15:40,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:40,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:15:40,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:15:40,975 INFO L87 Difference]: Start difference. First operand 75025 states and 220095 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:15:41,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:41,503 INFO L93 Difference]: Finished difference Result 80009 states and 233828 transitions. [2021-06-12 22:15:41,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:15:41,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:41,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:41,644 INFO L225 Difference]: With dead ends: 80009 [2021-06-12 22:15:41,644 INFO L226 Difference]: Without dead ends: 79935 [2021-06-12 22:15:41,645 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 636.7ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:15:42,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79935 states. [2021-06-12 22:15:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79935 to 74919. [2021-06-12 22:15:43,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74919 states, 74918 states have (on average 2.934087936143517) internal successors, (219816), 74918 states have internal predecessors, (219816), 0 states have call successors, (0), 0 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 22:15:43,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74919 states to 74919 states and 219816 transitions. [2021-06-12 22:15:43,339 INFO L78 Accepts]: Start accepts. Automaton has 74919 states and 219816 transitions. Word has length 40 [2021-06-12 22:15:43,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:43,339 INFO L482 AbstractCegarLoop]: Abstraction has 74919 states and 219816 transitions. [2021-06-12 22:15:43,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:15:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 74919 states and 219816 transitions. [2021-06-12 22:15:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:43,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:43,450 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:43,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:43,651 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:43,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:43,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1155007878, now seen corresponding path program 131 times [2021-06-12 22:15:43,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:43,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6694951] [2021-06-12 22:15:43,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:43,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:43,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6694951] [2021-06-12 22:15:43,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6694951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:43,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679519448] [2021-06-12 22:15:43,760 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:43,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:15:43,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:43,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:43,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:44,220 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-12 22:15:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:44,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679519448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:44,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:44,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 22:15:44,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007254746] [2021-06-12 22:15:44,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:15:44,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:44,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:15:44,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:15:44,281 INFO L87 Difference]: Start difference. First operand 74919 states and 219816 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:15:45,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:45,043 INFO L93 Difference]: Finished difference Result 81553 states and 238414 transitions. [2021-06-12 22:15:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:15:45,047 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:45,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:45,221 INFO L225 Difference]: With dead ends: 81553 [2021-06-12 22:15:45,221 INFO L226 Difference]: Without dead ends: 81439 [2021-06-12 22:15:45,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 565.8ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:15:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81439 states. [2021-06-12 22:15:46,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81439 to 77163. [2021-06-12 22:15:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77163 states, 77162 states have (on average 2.93608252766906) internal successors, (226554), 77162 states have internal predecessors, (226554), 0 states have call successors, (0), 0 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 22:15:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77163 states to 77163 states and 226554 transitions. [2021-06-12 22:15:46,714 INFO L78 Accepts]: Start accepts. Automaton has 77163 states and 226554 transitions. Word has length 40 [2021-06-12 22:15:46,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:46,714 INFO L482 AbstractCegarLoop]: Abstraction has 77163 states and 226554 transitions. [2021-06-12 22:15:46,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:15:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 77163 states and 226554 transitions. [2021-06-12 22:15:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:47,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:47,169 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:47,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-12 22:15:47,401 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:47,401 INFO L82 PathProgramCache]: Analyzing trace with hash -862357216, now seen corresponding path program 132 times [2021-06-12 22:15:47,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:47,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907917818] [2021-06-12 22:15:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:47,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:47,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907917818] [2021-06-12 22:15:47,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907917818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:47,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158775356] [2021-06-12 22:15:47,514 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:47,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:15:47,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:47,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:47,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:47,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158775356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:47,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:47,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 22:15:47,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704963972] [2021-06-12 22:15:47,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:15:47,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:47,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:15:47,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:15:47,725 INFO L87 Difference]: Start difference. First operand 77163 states and 226554 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:15:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:48,701 INFO L93 Difference]: Finished difference Result 86206 states and 252453 transitions. [2021-06-12 22:15:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:15:48,701 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:48,844 INFO L225 Difference]: With dead ends: 86206 [2021-06-12 22:15:48,845 INFO L226 Difference]: Without dead ends: 86116 [2021-06-12 22:15:48,845 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:15:48,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86116 states. [2021-06-12 22:15:50,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86116 to 81055. [2021-06-12 22:15:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81055 states, 81054 states have (on average 2.940928270042194) internal successors, (238374), 81054 states have internal predecessors, (238374), 0 states have call successors, (0), 0 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 22:15:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81055 states to 81055 states and 238374 transitions. [2021-06-12 22:15:50,308 INFO L78 Accepts]: Start accepts. Automaton has 81055 states and 238374 transitions. Word has length 40 [2021-06-12 22:15:50,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:50,308 INFO L482 AbstractCegarLoop]: Abstraction has 81055 states and 238374 transitions. [2021-06-12 22:15:50,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:15:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 81055 states and 238374 transitions. [2021-06-12 22:15:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:50,434 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:50,434 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:50,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-12 22:15:50,635 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:50,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:50,635 INFO L82 PathProgramCache]: Analyzing trace with hash -981440228, now seen corresponding path program 133 times [2021-06-12 22:15:50,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:50,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113602436] [2021-06-12 22:15:50,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:15:51,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:51,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113602436] [2021-06-12 22:15:51,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113602436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:51,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950075704] [2021-06-12 22:15:51,187 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:51,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:51,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:51,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950075704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:51,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:51,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 22:15:51,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661237487] [2021-06-12 22:15:51,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:15:51,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:51,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:15:51,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:15:51,464 INFO L87 Difference]: Start difference. First operand 81055 states and 238374 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 22:15:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:52,091 INFO L93 Difference]: Finished difference Result 86179 states and 252372 transitions. [2021-06-12 22:15:52,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:15:52,091 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:52,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:52,521 INFO L225 Difference]: With dead ends: 86179 [2021-06-12 22:15:52,522 INFO L226 Difference]: Without dead ends: 86059 [2021-06-12 22:15:52,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:15:52,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86059 states. [2021-06-12 22:15:53,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86059 to 80643. [2021-06-12 22:15:53,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80643 states, 80642 states have (on average 2.9357158800624985) internal successors, (236742), 80642 states have internal predecessors, (236742), 0 states have call successors, (0), 0 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 22:15:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80643 states to 80643 states and 236742 transitions. [2021-06-12 22:15:53,945 INFO L78 Accepts]: Start accepts. Automaton has 80643 states and 236742 transitions. Word has length 40 [2021-06-12 22:15:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:53,945 INFO L482 AbstractCegarLoop]: Abstraction has 80643 states and 236742 transitions. [2021-06-12 22:15:53,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 22:15:53,945 INFO L276 IsEmpty]: Start isEmpty. Operand 80643 states and 236742 transitions. [2021-06-12 22:15:54,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:54,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:54,372 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:54,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 22:15:54,589 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:54,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:54,589 INFO L82 PathProgramCache]: Analyzing trace with hash -837152646, now seen corresponding path program 134 times [2021-06-12 22:15:54,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:54,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049954230] [2021-06-12 22:15:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:54,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:54,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049954230] [2021-06-12 22:15:54,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049954230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:54,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052053509] [2021-06-12 22:15:54,711 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:54,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:15:54,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:54,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:15:54,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:54,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052053509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:54,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:54,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-12 22:15:54,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588402561] [2021-06-12 22:15:54,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:15:54,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:54,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:15:54,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:15:54,939 INFO L87 Difference]: Start difference. First operand 80643 states and 236742 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 22:15:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:56,001 INFO L93 Difference]: Finished difference Result 84857 states and 247966 transitions. [2021-06-12 22:15:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:15:56,001 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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) Word has length 40 [2021-06-12 22:15:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:56,134 INFO L225 Difference]: With dead ends: 84857 [2021-06-12 22:15:56,134 INFO L226 Difference]: Without dead ends: 84733 [2021-06-12 22:15:56,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 504.8ms TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:15:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84733 states. [2021-06-12 22:15:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84733 to 77769. [2021-06-12 22:15:57,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77769 states, 77768 states have (on average 2.9353075815245346) internal successors, (228273), 77768 states have internal predecessors, (228273), 0 states have call successors, (0), 0 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 22:15:57,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77769 states to 77769 states and 228273 transitions. [2021-06-12 22:15:57,575 INFO L78 Accepts]: Start accepts. Automaton has 77769 states and 228273 transitions. Word has length 40 [2021-06-12 22:15:57,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:57,575 INFO L482 AbstractCegarLoop]: Abstraction has 77769 states and 228273 transitions. [2021-06-12 22:15:57,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 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 22:15:57,575 INFO L276 IsEmpty]: Start isEmpty. Operand 77769 states and 228273 transitions. [2021-06-12 22:15:57,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:15:57,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:57,984 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:58,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-12 22:15:58,185 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:58,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:58,185 INFO L82 PathProgramCache]: Analyzing trace with hash 762977632, now seen corresponding path program 135 times [2021-06-12 22:15:58,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:58,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652773413] [2021-06-12 22:15:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:58,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:58,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652773413] [2021-06-12 22:15:58,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652773413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:58,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245896426] [2021-06-12 22:15:58,326 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:58,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:15:58,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:58,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:15:58,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:58,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245896426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:58,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:58,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 22:15:58,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580562808] [2021-06-12 22:15:58,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:15:58,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:58,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:15:58,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:15:58,575 INFO L87 Difference]: Start difference. First operand 77769 states and 228273 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:15:59,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:59,111 INFO L93 Difference]: Finished difference Result 81477 states and 238950 transitions. [2021-06-12 22:15:59,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:15:59,111 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 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 40 [2021-06-12 22:15:59,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:59,549 INFO L225 Difference]: With dead ends: 81477 [2021-06-12 22:15:59,549 INFO L226 Difference]: Without dead ends: 81403 [2021-06-12 22:15:59,549 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 294.3ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:15:59,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81403 states. [2021-06-12 22:16:00,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81403 to 81021. [2021-06-12 22:16:00,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81021 states, 81020 states have (on average 2.936571216983461) internal successors, (237921), 81020 states have internal predecessors, (237921), 0 states have call successors, (0), 0 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 22:16:00,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81021 states to 81021 states and 237921 transitions. [2021-06-12 22:16:00,975 INFO L78 Accepts]: Start accepts. Automaton has 81021 states and 237921 transitions. Word has length 40 [2021-06-12 22:16:00,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:00,975 INFO L482 AbstractCegarLoop]: Abstraction has 81021 states and 237921 transitions. [2021-06-12 22:16:00,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:16:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 81021 states and 237921 transitions. [2021-06-12 22:16:01,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:16:01,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:01,396 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:01,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-12 22:16:01,609 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:01,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:01,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1088400518, now seen corresponding path program 136 times [2021-06-12 22:16:01,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:01,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784092576] [2021-06-12 22:16:01,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:01,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:01,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784092576] [2021-06-12 22:16:01,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784092576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:01,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127155250] [2021-06-12 22:16:01,726 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:01,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:01,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:01,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:01,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:01,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127155250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:01,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:01,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 22:16:01,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897124343] [2021-06-12 22:16:01,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:16:01,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:01,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:16:01,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:16:01,949 INFO L87 Difference]: Start difference. First operand 81021 states and 237921 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:16:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:02,511 INFO L93 Difference]: Finished difference Result 83181 states and 243998 transitions. [2021-06-12 22:16:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:16:02,511 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 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 40 [2021-06-12 22:16:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:02,902 INFO L225 Difference]: With dead ends: 83181 [2021-06-12 22:16:02,902 INFO L226 Difference]: Without dead ends: 83107 [2021-06-12 22:16:02,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 264.6ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:16:02,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83107 states. [2021-06-12 22:16:04,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83107 to 79989. [2021-06-12 22:16:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79989 states, 79988 states have (on average 2.937803170475571) internal successors, (234989), 79988 states have internal predecessors, (234989), 0 states have call successors, (0), 0 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 22:16:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79989 states to 79989 states and 234989 transitions. [2021-06-12 22:16:04,306 INFO L78 Accepts]: Start accepts. Automaton has 79989 states and 234989 transitions. Word has length 40 [2021-06-12 22:16:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:04,306 INFO L482 AbstractCegarLoop]: Abstraction has 79989 states and 234989 transitions. [2021-06-12 22:16:04,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:16:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 79989 states and 234989 transitions. [2021-06-12 22:16:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:16:04,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:04,416 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:04,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:04,616 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:04,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1493177376, now seen corresponding path program 137 times [2021-06-12 22:16:04,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:04,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207588841] [2021-06-12 22:16:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:05,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:05,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207588841] [2021-06-12 22:16:05,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207588841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:05,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5030990] [2021-06-12 22:16:05,060 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:05,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:16:05,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:05,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:05,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:05,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5030990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:05,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:05,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 22:16:05,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809797412] [2021-06-12 22:16:05,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:16:05,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:05,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:16:05,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:16:05,328 INFO L87 Difference]: Start difference. First operand 79989 states and 234989 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:16:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:05,808 INFO L93 Difference]: Finished difference Result 83703 states and 245487 transitions. [2021-06-12 22:16:05,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:16:05,808 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 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 40 [2021-06-12 22:16:05,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:05,951 INFO L225 Difference]: With dead ends: 83703 [2021-06-12 22:16:05,951 INFO L226 Difference]: Without dead ends: 83589 [2021-06-12 22:16:05,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 598.5ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:16:06,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83589 states. [2021-06-12 22:16:07,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83589 to 79601. [2021-06-12 22:16:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79601 states, 79600 states have (on average 2.9393090452261306) internal successors, (233969), 79600 states have internal predecessors, (233969), 0 states have call successors, (0), 0 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 22:16:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79601 states to 79601 states and 233969 transitions. [2021-06-12 22:16:07,701 INFO L78 Accepts]: Start accepts. Automaton has 79601 states and 233969 transitions. Word has length 40 [2021-06-12 22:16:07,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:07,701 INFO L482 AbstractCegarLoop]: Abstraction has 79601 states and 233969 transitions. [2021-06-12 22:16:07,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:16:07,701 INFO L276 IsEmpty]: Start isEmpty. Operand 79601 states and 233969 transitions. [2021-06-12 22:16:07,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:16:07,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:07,818 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:08,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-12 22:16:08,019 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:08,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1063230778, now seen corresponding path program 138 times [2021-06-12 22:16:08,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:08,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042775171] [2021-06-12 22:16:08,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:08,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:08,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042775171] [2021-06-12 22:16:08,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042775171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:08,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192119530] [2021-06-12 22:16:08,114 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:08,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:16:08,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:08,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:08,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:08,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192119530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:08,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:08,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 22:16:08,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913776878] [2021-06-12 22:16:08,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:16:08,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:08,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:16:08,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:16:08,336 INFO L87 Difference]: Start difference. First operand 79601 states and 233969 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:16:09,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:09,205 INFO L93 Difference]: Finished difference Result 84051 states and 247089 transitions. [2021-06-12 22:16:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:16:09,205 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 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 40 [2021-06-12 22:16:09,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:09,352 INFO L225 Difference]: With dead ends: 84051 [2021-06-12 22:16:09,352 INFO L226 Difference]: Without dead ends: 83961 [2021-06-12 22:16:09,352 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 591.9ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83961 states. [2021-06-12 22:16:10,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83961 to 82811. [2021-06-12 22:16:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82811 states, 82810 states have (on average 2.943557541359739) internal successors, (243756), 82810 states have internal predecessors, (243756), 0 states have call successors, (0), 0 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 22:16:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82811 states to 82811 states and 243756 transitions. [2021-06-12 22:16:11,223 INFO L78 Accepts]: Start accepts. Automaton has 82811 states and 243756 transitions. Word has length 40 [2021-06-12 22:16:11,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:11,223 INFO L482 AbstractCegarLoop]: Abstraction has 82811 states and 243756 transitions. [2021-06-12 22:16:11,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:16:11,223 INFO L276 IsEmpty]: Start isEmpty. Operand 82811 states and 243756 transitions. [2021-06-12 22:16:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:16:11,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:11,360 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:11,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-12 22:16:11,561 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:11,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1182313790, now seen corresponding path program 139 times [2021-06-12 22:16:11,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:11,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462268333] [2021-06-12 22:16:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:16:11,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:11,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462268333] [2021-06-12 22:16:11,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462268333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:11,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551001546] [2021-06-12 22:16:11,659 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:11,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:11,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:11,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551001546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:11,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:11,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 22:16:11,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917838863] [2021-06-12 22:16:11,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:16:11,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:11,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:16:11,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:16:11,888 INFO L87 Difference]: Start difference. First operand 82811 states and 243756 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:16:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:12,629 INFO L93 Difference]: Finished difference Result 84018 states and 247010 transitions. [2021-06-12 22:16:12,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:16:12,629 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 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 40 [2021-06-12 22:16:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:12,776 INFO L225 Difference]: With dead ends: 84018 [2021-06-12 22:16:12,776 INFO L226 Difference]: Without dead ends: 83902 [2021-06-12 22:16:12,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:12,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83902 states. [2021-06-12 22:16:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83902 to 82781. [2021-06-12 22:16:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82781 states, 82780 states have (on average 2.9422928243537085) internal successors, (243563), 82780 states have internal predecessors, (243563), 0 states have call successors, (0), 0 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 22:16:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82781 states to 82781 states and 243563 transitions. [2021-06-12 22:16:14,588 INFO L78 Accepts]: Start accepts. Automaton has 82781 states and 243563 transitions. Word has length 40 [2021-06-12 22:16:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:14,588 INFO L482 AbstractCegarLoop]: Abstraction has 82781 states and 243563 transitions. [2021-06-12 22:16:14,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:16:14,588 INFO L276 IsEmpty]: Start isEmpty. Operand 82781 states and 243563 transitions. [2021-06-12 22:16:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:16:14,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:14,709 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:14,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:14,913 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:14,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:14,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1038026208, now seen corresponding path program 140 times [2021-06-12 22:16:14,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:14,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020205233] [2021-06-12 22:16:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:16:15,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:15,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020205233] [2021-06-12 22:16:15,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020205233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:15,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389108490] [2021-06-12 22:16:15,029 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:15,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:16:15,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:15,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:16:15,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:15,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389108490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:15,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:15,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-12 22:16:15,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709870111] [2021-06-12 22:16:15,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:16:15,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:15,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:16:15,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:16:15,308 INFO L87 Difference]: Start difference. First operand 82781 states and 243563 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 22:16:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:16,613 INFO L93 Difference]: Finished difference Result 83683 states and 245710 transitions. [2021-06-12 22:16:16,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:16:16,613 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 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 40 [2021-06-12 22:16:16,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:16,829 INFO L225 Difference]: With dead ends: 83683 [2021-06-12 22:16:16,829 INFO L226 Difference]: Without dead ends: 83552 [2021-06-12 22:16:16,829 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 541.4ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:16:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83552 states. [2021-06-12 22:16:18,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83552 to 82767. [2021-06-12 22:16:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82767 states, 82766 states have (on average 2.9417876905975886) internal successors, (243480), 82766 states have internal predecessors, (243480), 0 states have call successors, (0), 0 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 22:16:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82767 states to 82767 states and 243480 transitions. [2021-06-12 22:16:18,737 INFO L78 Accepts]: Start accepts. Automaton has 82767 states and 243480 transitions. Word has length 40 [2021-06-12 22:16:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:18,737 INFO L482 AbstractCegarLoop]: Abstraction has 82767 states and 243480 transitions. [2021-06-12 22:16:18,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 22:16:18,737 INFO L276 IsEmpty]: Start isEmpty. Operand 82767 states and 243480 transitions. [2021-06-12 22:16:18,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:16:18,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:18,858 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:19,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-12 22:16:19,059 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:19,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:19,059 INFO L82 PathProgramCache]: Analyzing trace with hash -38591008, now seen corresponding path program 141 times [2021-06-12 22:16:19,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:19,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915474169] [2021-06-12 22:16:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:19,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:19,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915474169] [2021-06-12 22:16:19,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915474169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:19,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393801786] [2021-06-12 22:16:19,182 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:19,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 22:16:19,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:19,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:16:19,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:19,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393801786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:19,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:19,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-12 22:16:19,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321230876] [2021-06-12 22:16:19,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:16:19,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:19,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:16:19,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:16:19,434 INFO L87 Difference]: Start difference. First operand 82767 states and 243480 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:16:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:20,412 INFO L93 Difference]: Finished difference Result 83411 states and 244946 transitions. [2021-06-12 22:16:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:16:20,413 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 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 40 [2021-06-12 22:16:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:20,564 INFO L225 Difference]: With dead ends: 83411 [2021-06-12 22:16:20,564 INFO L226 Difference]: Without dead ends: 83281 [2021-06-12 22:16:20,564 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:16:20,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83281 states. [2021-06-12 22:16:21,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83281 to 79371. [2021-06-12 22:16:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79371 states, 79370 states have (on average 2.9420435932972158) internal successors, (233510), 79370 states have internal predecessors, (233510), 0 states have call successors, (0), 0 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 22:16:22,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79371 states to 79371 states and 233510 transitions. [2021-06-12 22:16:22,394 INFO L78 Accepts]: Start accepts. Automaton has 79371 states and 233510 transitions. Word has length 40 [2021-06-12 22:16:22,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:22,394 INFO L482 AbstractCegarLoop]: Abstraction has 79371 states and 233510 transitions. [2021-06-12 22:16:22,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:16:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 79371 states and 233510 transitions. [2021-06-12 22:16:22,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:16:22,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:22,530 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:22,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:22,730 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:22,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1856068912, now seen corresponding path program 142 times [2021-06-12 22:16:22,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:22,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592244519] [2021-06-12 22:16:22,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:22,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:22,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592244519] [2021-06-12 22:16:22,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592244519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:22,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916825160] [2021-06-12 22:16:22,871 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:22,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:22,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:22,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:22,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:23,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916825160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:23,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:23,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:16:23,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742420722] [2021-06-12 22:16:23,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:16:23,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:16:23,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:16:23,122 INFO L87 Difference]: Start difference. First operand 79371 states and 233510 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:16:23,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:23,961 INFO L93 Difference]: Finished difference Result 87077 states and 255818 transitions. [2021-06-12 22:16:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:16:23,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 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 40 [2021-06-12 22:16:23,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:24,118 INFO L225 Difference]: With dead ends: 87077 [2021-06-12 22:16:24,118 INFO L226 Difference]: Without dead ends: 86965 [2021-06-12 22:16:24,118 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:24,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86965 states. [2021-06-12 22:16:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86965 to 86453. [2021-06-12 22:16:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86453 states, 86452 states have (on average 2.9423379447554714) internal successors, (254371), 86452 states have internal predecessors, (254371), 0 states have call successors, (0), 0 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 22:16:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86453 states to 86453 states and 254371 transitions. [2021-06-12 22:16:25,990 INFO L78 Accepts]: Start accepts. Automaton has 86453 states and 254371 transitions. Word has length 40 [2021-06-12 22:16:25,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:25,990 INFO L482 AbstractCegarLoop]: Abstraction has 86453 states and 254371 transitions. [2021-06-12 22:16:25,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:16:25,990 INFO L276 IsEmpty]: Start isEmpty. Operand 86453 states and 254371 transitions. [2021-06-12 22:16:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:16:26,117 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:26,117 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:26,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:26,317 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:26,317 INFO L82 PathProgramCache]: Analyzing trace with hash 870160672, now seen corresponding path program 143 times [2021-06-12 22:16:26,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:26,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424901606] [2021-06-12 22:16:26,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:26,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:26,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424901606] [2021-06-12 22:16:26,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424901606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:26,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518589486] [2021-06-12 22:16:26,450 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:26,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:16:26,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:26,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:26,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:26,963 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-12 22:16:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:27,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518589486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:27,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:27,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 22:16:27,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807689583] [2021-06-12 22:16:27,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:16:27,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:27,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:16:27,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:16:27,092 INFO L87 Difference]: Start difference. First operand 86453 states and 254371 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:16:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:27,670 INFO L93 Difference]: Finished difference Result 91999 states and 270405 transitions. [2021-06-12 22:16:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:16:27,671 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 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 40 [2021-06-12 22:16:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:27,837 INFO L225 Difference]: With dead ends: 91999 [2021-06-12 22:16:27,837 INFO L226 Difference]: Without dead ends: 91867 [2021-06-12 22:16:27,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 320.0ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:16:28,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91867 states. [2021-06-12 22:16:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91867 to 87283. [2021-06-12 22:16:29,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87283 states, 87282 states have (on average 2.9414770513966224) internal successors, (256738), 87282 states have internal predecessors, (256738), 0 states have call successors, (0), 0 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 22:16:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87283 states to 87283 states and 256738 transitions. [2021-06-12 22:16:29,654 INFO L78 Accepts]: Start accepts. Automaton has 87283 states and 256738 transitions. Word has length 40 [2021-06-12 22:16:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:29,654 INFO L482 AbstractCegarLoop]: Abstraction has 87283 states and 256738 transitions. [2021-06-12 22:16:29,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:16:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 87283 states and 256738 transitions. [2021-06-12 22:16:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:16:30,132 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:30,132 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:30,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-12 22:16:30,345 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:30,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:30,345 INFO L82 PathProgramCache]: Analyzing trace with hash -674180934, now seen corresponding path program 144 times [2021-06-12 22:16:30,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:30,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848824876] [2021-06-12 22:16:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:30,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:30,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848824876] [2021-06-12 22:16:30,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848824876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:30,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302324081] [2021-06-12 22:16:30,439 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:30,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:16:30,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:30,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:30,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:30,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302324081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:30,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:30,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 22:16:30,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306735624] [2021-06-12 22:16:30,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:16:30,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:30,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:16:30,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:16:30,677 INFO L87 Difference]: Start difference. First operand 87283 states and 256738 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:16:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:31,478 INFO L93 Difference]: Finished difference Result 89515 states and 263099 transitions. [2021-06-12 22:16:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:16:31,479 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 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 40 [2021-06-12 22:16:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:31,643 INFO L225 Difference]: With dead ends: 89515 [2021-06-12 22:16:31,643 INFO L226 Difference]: Without dead ends: 89401 [2021-06-12 22:16:31,643 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:16:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89401 states. [2021-06-12 22:16:32,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89401 to 82167. [2021-06-12 22:16:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82167 states, 82166 states have (on average 2.9420198135481828) internal successors, (241734), 82166 states have internal predecessors, (241734), 0 states have call successors, (0), 0 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 22:16:33,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82167 states to 82167 states and 241734 transitions. [2021-06-12 22:16:33,120 INFO L78 Accepts]: Start accepts. Automaton has 82167 states and 241734 transitions. Word has length 40 [2021-06-12 22:16:33,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:33,120 INFO L482 AbstractCegarLoop]: Abstraction has 82167 states and 241734 transitions. [2021-06-12 22:16:33,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:16:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 82167 states and 241734 transitions. [2021-06-12 22:16:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:16:33,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:33,568 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:33,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-12 22:16:33,789 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:33,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1896894304, now seen corresponding path program 145 times [2021-06-12 22:16:33,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:33,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760693196] [2021-06-12 22:16:33,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:33,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:33,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760693196] [2021-06-12 22:16:33,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760693196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:33,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367684715] [2021-06-12 22:16:33,876 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:33,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:33,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:34,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367684715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:34,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:34,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-12 22:16:34,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125669204] [2021-06-12 22:16:34,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:16:34,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:34,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:16:34,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:16:34,136 INFO L87 Difference]: Start difference. First operand 82167 states and 241734 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:16:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:34,644 INFO L93 Difference]: Finished difference Result 88605 states and 260666 transitions. [2021-06-12 22:16:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:16:34,644 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 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 40 [2021-06-12 22:16:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:35,119 INFO L225 Difference]: With dead ends: 88605 [2021-06-12 22:16:35,119 INFO L226 Difference]: Without dead ends: 88523 [2021-06-12 22:16:35,119 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:16:35,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88523 states. [2021-06-12 22:16:36,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88523 to 87987. [2021-06-12 22:16:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87987 states, 87986 states have (on average 2.944263860159571) internal successors, (259054), 87986 states have internal predecessors, (259054), 0 states have call successors, (0), 0 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 22:16:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87987 states to 87987 states and 259054 transitions. [2021-06-12 22:16:36,609 INFO L78 Accepts]: Start accepts. Automaton has 87987 states and 259054 transitions. Word has length 40 [2021-06-12 22:16:36,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:36,609 INFO L482 AbstractCegarLoop]: Abstraction has 87987 states and 259054 transitions. [2021-06-12 22:16:36,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:16:36,609 INFO L276 IsEmpty]: Start isEmpty. Operand 87987 states and 259054 transitions. [2021-06-12 22:16:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:16:37,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:37,118 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:37,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-12 22:16:37,325 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:37,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:37,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1777811292, now seen corresponding path program 146 times [2021-06-12 22:16:37,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:37,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341174322] [2021-06-12 22:16:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:16:37,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:37,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341174322] [2021-06-12 22:16:37,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341174322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:37,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894651474] [2021-06-12 22:16:37,408 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:37,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:16:37,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:37,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:37,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:37,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894651474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:37,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:37,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-12 22:16:37,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559435542] [2021-06-12 22:16:37,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:16:37,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:37,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:16:37,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:16:37,639 INFO L87 Difference]: Start difference. First operand 87987 states and 259054 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:16:38,468 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-12 22:16:38,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:38,511 INFO L93 Difference]: Finished difference Result 88582 states and 260614 transitions. [2021-06-12 22:16:38,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:16:38,511 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 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 40 [2021-06-12 22:16:38,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:38,683 INFO L225 Difference]: With dead ends: 88582 [2021-06-12 22:16:38,683 INFO L226 Difference]: Without dead ends: 88470 [2021-06-12 22:16:38,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 541.6ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:16:38,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88470 states. [2021-06-12 22:16:39,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88470 to 86373. [2021-06-12 22:16:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86373 states, 86372 states have (on average 2.942354003612282) internal successors, (254137), 86372 states have internal predecessors, (254137), 0 states have call successors, (0), 0 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 22:16:40,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86373 states to 86373 states and 254137 transitions. [2021-06-12 22:16:40,543 INFO L78 Accepts]: Start accepts. Automaton has 86373 states and 254137 transitions. Word has length 40 [2021-06-12 22:16:40,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:40,543 INFO L482 AbstractCegarLoop]: Abstraction has 86373 states and 254137 transitions. [2021-06-12 22:16:40,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:16:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 86373 states and 254137 transitions. [2021-06-12 22:16:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:16:40,723 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:40,723 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:40,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-12 22:16:40,941 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:40,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1922098874, now seen corresponding path program 147 times [2021-06-12 22:16:40,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:40,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202264388] [2021-06-12 22:16:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:16:41,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:41,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202264388] [2021-06-12 22:16:41,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202264388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:41,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899095632] [2021-06-12 22:16:41,038 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:41,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:16:41,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:41,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:16:41,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:41,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899095632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:41,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:41,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-06-12 22:16:41,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096895487] [2021-06-12 22:16:41,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:16:41,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:41,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:16:41,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:16:41,297 INFO L87 Difference]: Start difference. First operand 86373 states and 254137 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 22:16:42,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:42,190 INFO L93 Difference]: Finished difference Result 88556 states and 260312 transitions. [2021-06-12 22:16:42,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:16:42,190 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 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 40 [2021-06-12 22:16:42,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:42,358 INFO L225 Difference]: With dead ends: 88556 [2021-06-12 22:16:42,359 INFO L226 Difference]: Without dead ends: 88432 [2021-06-12 22:16:42,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:16:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88432 states. [2021-06-12 22:16:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88432 to 87931. [2021-06-12 22:16:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87931 states, 87930 states have (on average 2.943682474695781) internal successors, (258838), 87930 states have internal predecessors, (258838), 0 states have call successors, (0), 0 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 22:16:44,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87931 states to 87931 states and 258838 transitions. [2021-06-12 22:16:44,189 INFO L78 Accepts]: Start accepts. Automaton has 87931 states and 258838 transitions. Word has length 40 [2021-06-12 22:16:44,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:44,189 INFO L482 AbstractCegarLoop]: Abstraction has 87931 states and 258838 transitions. [2021-06-12 22:16:44,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 22:16:44,189 INFO L276 IsEmpty]: Start isEmpty. Operand 87931 states and 258838 transitions. [2021-06-12 22:16:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:16:44,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:44,317 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:44,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:44,518 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:44,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1373433222, now seen corresponding path program 148 times [2021-06-12 22:16:44,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:44,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852928622] [2021-06-12 22:16:44,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:16:44,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:44,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852928622] [2021-06-12 22:16:44,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852928622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:44,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400826710] [2021-06-12 22:16:44,647 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:44,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:44,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:44,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:44,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:44,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400826710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:44,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:44,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 22:16:44,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293600776] [2021-06-12 22:16:44,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:16:44,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:44,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:16:44,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:16:44,909 INFO L87 Difference]: Start difference. First operand 87931 states and 258838 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 22:16:45,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:45,728 INFO L93 Difference]: Finished difference Result 88462 states and 260034 transitions. [2021-06-12 22:16:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:16:45,728 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 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 40 [2021-06-12 22:16:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:45,897 INFO L225 Difference]: With dead ends: 88462 [2021-06-12 22:16:45,898 INFO L226 Difference]: Without dead ends: 88332 [2021-06-12 22:16:45,898 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:16:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88332 states. [2021-06-12 22:16:47,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88332 to 87915. [2021-06-12 22:16:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87915 states, 87914 states have (on average 2.9437177241395) internal successors, (258794), 87914 states have internal predecessors, (258794), 0 states have call successors, (0), 0 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 22:16:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87915 states to 87915 states and 258794 transitions. [2021-06-12 22:16:48,189 INFO L78 Accepts]: Start accepts. Automaton has 87915 states and 258794 transitions. Word has length 40 [2021-06-12 22:16:48,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:48,189 INFO L482 AbstractCegarLoop]: Abstraction has 87915 states and 258794 transitions. [2021-06-12 22:16:48,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 22:16:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 87915 states and 258794 transitions. [2021-06-12 22:16:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 22:16:48,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:48,301 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:48,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-12 22:16:48,502 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:48,502 INFO L82 PathProgramCache]: Analyzing trace with hash 87314106, now seen corresponding path program 149 times [2021-06-12 22:16:48,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:48,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798876083] [2021-06-12 22:16:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:48,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:48,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798876083] [2021-06-12 22:16:48,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798876083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:48,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069343390] [2021-06-12 22:16:48,637 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:48,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:16:48,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:48,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:48,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:48,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069343390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:48,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:48,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:16:48,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512008197] [2021-06-12 22:16:48,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:16:48,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:48,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:16:48,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:16:48,897 INFO L87 Difference]: Start difference. First operand 87915 states and 258794 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:16:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:49,666 INFO L93 Difference]: Finished difference Result 88421 states and 259928 transitions. [2021-06-12 22:16:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:16:49,666 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 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 40 [2021-06-12 22:16:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:49,826 INFO L225 Difference]: With dead ends: 88421 [2021-06-12 22:16:49,826 INFO L226 Difference]: Without dead ends: 88345 [2021-06-12 22:16:49,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 294.3ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:49,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88345 states. [2021-06-12 22:16:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88345 to 81541. [2021-06-12 22:16:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81541 states, 81540 states have (on average 2.944432180524896) internal successors, (240089), 81540 states have internal predecessors, (240089), 0 states have call successors, (0), 0 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 22:16:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81541 states to 81541 states and 240089 transitions. [2021-06-12 22:16:51,675 INFO L78 Accepts]: Start accepts. Automaton has 81541 states and 240089 transitions. Word has length 40 [2021-06-12 22:16:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:51,675 INFO L482 AbstractCegarLoop]: Abstraction has 81541 states and 240089 transitions. [2021-06-12 22:16:51,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:16:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 81541 states and 240089 transitions. [2021-06-12 22:16:51,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:16:51,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:51,796 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:51,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-12 22:16:51,997 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:51,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:51,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1013579830, now seen corresponding path program 150 times [2021-06-12 22:16:51,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:51,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183404443] [2021-06-12 22:16:51,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:52,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:52,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183404443] [2021-06-12 22:16:52,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183404443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:52,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374478415] [2021-06-12 22:16:52,039 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:52,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:16:52,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:52,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:16:52,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:52,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374478415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:52,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:52,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 22:16:52,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099028698] [2021-06-12 22:16:52,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:16:52,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:52,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:16:52,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:16:52,152 INFO L87 Difference]: Start difference. First operand 81541 states and 240089 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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 22:16:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:52,998 INFO L93 Difference]: Finished difference Result 106475 states and 313342 transitions. [2021-06-12 22:16:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:16:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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) Word has length 43 [2021-06-12 22:16:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:53,216 INFO L225 Difference]: With dead ends: 106475 [2021-06-12 22:16:53,216 INFO L226 Difference]: Without dead ends: 106475 [2021-06-12 22:16:53,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106475 states. [2021-06-12 22:16:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106475 to 82605. [2021-06-12 22:16:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82605 states, 82604 states have (on average 2.9431504527625783) internal successors, (243116), 82604 states have internal predecessors, (243116), 0 states have call successors, (0), 0 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 22:16:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82605 states to 82605 states and 243116 transitions. [2021-06-12 22:16:55,142 INFO L78 Accepts]: Start accepts. Automaton has 82605 states and 243116 transitions. Word has length 43 [2021-06-12 22:16:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:55,142 INFO L482 AbstractCegarLoop]: Abstraction has 82605 states and 243116 transitions. [2021-06-12 22:16:55,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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 22:16:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 82605 states and 243116 transitions. [2021-06-12 22:16:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:16:55,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:55,266 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:55,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-12 22:16:55,466 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:55,467 INFO L82 PathProgramCache]: Analyzing trace with hash -22106132, now seen corresponding path program 151 times [2021-06-12 22:16:55,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:55,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638701870] [2021-06-12 22:16:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:55,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:55,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638701870] [2021-06-12 22:16:55,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638701870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:55,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231721772] [2021-06-12 22:16:55,509 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:55,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:16:55,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:55,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231721772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:55,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:55,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 22:16:55,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185365581] [2021-06-12 22:16:55,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:16:55,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:55,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:16:55,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:16:55,650 INFO L87 Difference]: Start difference. First operand 82605 states and 243116 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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 22:16:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:56,523 INFO L93 Difference]: Finished difference Result 128181 states and 373839 transitions. [2021-06-12 22:16:56,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:16:56,523 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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) Word has length 43 [2021-06-12 22:16:56,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:56,774 INFO L225 Difference]: With dead ends: 128181 [2021-06-12 22:16:56,774 INFO L226 Difference]: Without dead ends: 128094 [2021-06-12 22:16:56,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:57,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128094 states. [2021-06-12 22:16:58,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128094 to 82605. [2021-06-12 22:16:58,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82605 states, 82604 states have (on average 2.943017287298436) internal successors, (243105), 82604 states have internal predecessors, (243105), 0 states have call successors, (0), 0 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 22:16:59,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82605 states to 82605 states and 243105 transitions. [2021-06-12 22:16:59,154 INFO L78 Accepts]: Start accepts. Automaton has 82605 states and 243105 transitions. Word has length 43 [2021-06-12 22:16:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:59,155 INFO L482 AbstractCegarLoop]: Abstraction has 82605 states and 243105 transitions. [2021-06-12 22:16:59,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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 22:16:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 82605 states and 243105 transitions. [2021-06-12 22:16:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:16:59,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:59,296 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:59,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:59,497 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:59,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1136369384, now seen corresponding path program 152 times [2021-06-12 22:16:59,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:59,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324333416] [2021-06-12 22:16:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:59,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:59,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324333416] [2021-06-12 22:16:59,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324333416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:59,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905620076] [2021-06-12 22:16:59,539 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:59,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:16:59,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:59,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:16:59,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:59,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905620076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:59,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:59,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:16:59,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759332207] [2021-06-12 22:16:59,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:16:59,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:59,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:16:59,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:16:59,693 INFO L87 Difference]: Start difference. First operand 82605 states and 243105 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:17:01,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:01,174 INFO L93 Difference]: Finished difference Result 145421 states and 423333 transitions. [2021-06-12 22:17:01,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:17:01,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 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 43 [2021-06-12 22:17:01,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:01,456 INFO L225 Difference]: With dead ends: 145421 [2021-06-12 22:17:01,456 INFO L226 Difference]: Without dead ends: 145391 [2021-06-12 22:17:01,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 616.3ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:17:01,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145391 states. [2021-06-12 22:17:03,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145391 to 98900. [2021-06-12 22:17:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98900 states, 98899 states have (on average 2.952426212600734) internal successors, (291992), 98899 states have internal predecessors, (291992), 0 states have call successors, (0), 0 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 22:17:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98900 states to 98900 states and 291992 transitions. [2021-06-12 22:17:04,409 INFO L78 Accepts]: Start accepts. Automaton has 98900 states and 291992 transitions. Word has length 43 [2021-06-12 22:17:04,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:04,409 INFO L482 AbstractCegarLoop]: Abstraction has 98900 states and 291992 transitions. [2021-06-12 22:17:04,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:17:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 98900 states and 291992 transitions. [2021-06-12 22:17:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:17:04,552 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:04,552 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:04,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-12 22:17:04,753 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:04,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:04,753 INFO L82 PathProgramCache]: Analyzing trace with hash 925672338, now seen corresponding path program 153 times [2021-06-12 22:17:04,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:04,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262313932] [2021-06-12 22:17:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:04,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:04,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262313932] [2021-06-12 22:17:04,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262313932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:04,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476333934] [2021-06-12 22:17:04,796 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:04,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:17:04,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:04,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:17:04,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:04,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476333934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:04,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:04,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:17:04,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020145389] [2021-06-12 22:17:04,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:04,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:04,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:04,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:04,920 INFO L87 Difference]: Start difference. First operand 98900 states and 291992 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:17:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:06,138 INFO L93 Difference]: Finished difference Result 115582 states and 339026 transitions. [2021-06-12 22:17:06,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:17:06,139 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 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 43 [2021-06-12 22:17:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:06,394 INFO L225 Difference]: With dead ends: 115582 [2021-06-12 22:17:06,394 INFO L226 Difference]: Without dead ends: 115570 [2021-06-12 22:17:06,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=876, Invalid=1674, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:17:06,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115570 states. [2021-06-12 22:17:08,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115570 to 102024. [2021-06-12 22:17:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102024 states, 102023 states have (on average 2.9566078237260225) internal successors, (301642), 102023 states have internal predecessors, (301642), 0 states have call successors, (0), 0 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 22:17:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102024 states to 102024 states and 301642 transitions. [2021-06-12 22:17:08,853 INFO L78 Accepts]: Start accepts. Automaton has 102024 states and 301642 transitions. Word has length 43 [2021-06-12 22:17:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:08,853 INFO L482 AbstractCegarLoop]: Abstraction has 102024 states and 301642 transitions. [2021-06-12 22:17:08,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:17:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 102024 states and 301642 transitions. [2021-06-12 22:17:09,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:17:09,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:09,408 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:09,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:09,633 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:09,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:09,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1654424156, now seen corresponding path program 154 times [2021-06-12 22:17:09,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:09,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86114404] [2021-06-12 22:17:09,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:09,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86114404] [2021-06-12 22:17:09,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86114404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269662657] [2021-06-12 22:17:09,675 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:09,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:09,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:09,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:17:09,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:09,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269662657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:09,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:09,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:17:09,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817938547] [2021-06-12 22:17:09,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:09,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:09,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:09,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:09,806 INFO L87 Difference]: Start difference. First operand 102024 states and 301642 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:17:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:11,131 INFO L93 Difference]: Finished difference Result 117555 states and 344061 transitions. [2021-06-12 22:17:11,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:17:11,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 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 43 [2021-06-12 22:17:11,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:11,340 INFO L225 Difference]: With dead ends: 117555 [2021-06-12 22:17:11,340 INFO L226 Difference]: Without dead ends: 117555 [2021-06-12 22:17:11,340 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 510.7ms TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:17:11,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117555 states. [2021-06-12 22:17:13,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117555 to 94698. [2021-06-12 22:17:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94698 states, 94697 states have (on average 2.949797776064712) internal successors, (279337), 94697 states have internal predecessors, (279337), 0 states have call successors, (0), 0 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 22:17:13,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94698 states to 94698 states and 279337 transitions. [2021-06-12 22:17:13,791 INFO L78 Accepts]: Start accepts. Automaton has 94698 states and 279337 transitions. Word has length 43 [2021-06-12 22:17:13,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:13,791 INFO L482 AbstractCegarLoop]: Abstraction has 94698 states and 279337 transitions. [2021-06-12 22:17:13,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:17:13,791 INFO L276 IsEmpty]: Start isEmpty. Operand 94698 states and 279337 transitions. [2021-06-12 22:17:13,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:17:13,927 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:13,927 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:14,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:14,128 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:14,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1277453002, now seen corresponding path program 155 times [2021-06-12 22:17:14,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:14,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958917753] [2021-06-12 22:17:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:14,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:14,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958917753] [2021-06-12 22:17:14,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958917753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:14,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636171247] [2021-06-12 22:17:14,170 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:14,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:17:14,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:14,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:17:14,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:14,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636171247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:14,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:14,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:17:14,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621267500] [2021-06-12 22:17:14,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:14,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:14,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:14,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:14,298 INFO L87 Difference]: Start difference. First operand 94698 states and 279337 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:17:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:15,538 INFO L93 Difference]: Finished difference Result 139702 states and 406719 transitions. [2021-06-12 22:17:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:17:15,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 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 43 [2021-06-12 22:17:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:16,164 INFO L225 Difference]: With dead ends: 139702 [2021-06-12 22:17:16,164 INFO L226 Difference]: Without dead ends: 139688 [2021-06-12 22:17:16,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 365.5ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:17:16,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139688 states. [2021-06-12 22:17:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139688 to 87080. [2021-06-12 22:17:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87080 states, 87079 states have (on average 2.938527084601339) internal successors, (255884), 87079 states have internal predecessors, (255884), 0 states have call successors, (0), 0 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 22:17:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87080 states to 87080 states and 255884 transitions. [2021-06-12 22:17:18,982 INFO L78 Accepts]: Start accepts. Automaton has 87080 states and 255884 transitions. Word has length 43 [2021-06-12 22:17:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:18,982 INFO L482 AbstractCegarLoop]: Abstraction has 87080 states and 255884 transitions. [2021-06-12 22:17:18,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:17:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 87080 states and 255884 transitions. [2021-06-12 22:17:19,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:17:19,165 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:19,165 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:19,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:19,365 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:19,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:19,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1361851776, now seen corresponding path program 156 times [2021-06-12 22:17:19,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:19,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506100469] [2021-06-12 22:17:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:19,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:19,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506100469] [2021-06-12 22:17:19,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506100469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:19,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292141771] [2021-06-12 22:17:19,408 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:19,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:17:19,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:19,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:17:19,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:19,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292141771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:19,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:19,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:17:19,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139426128] [2021-06-12 22:17:19,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:19,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:19,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:19,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:19,548 INFO L87 Difference]: Start difference. First operand 87080 states and 255884 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:17:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:20,774 INFO L93 Difference]: Finished difference Result 134788 states and 392170 transitions. [2021-06-12 22:17:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:17:20,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 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 43 [2021-06-12 22:17:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:21,041 INFO L225 Difference]: With dead ends: 134788 [2021-06-12 22:17:21,041 INFO L226 Difference]: Without dead ends: 134732 [2021-06-12 22:17:21,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=502, Invalid=1568, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:17:21,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134732 states. [2021-06-12 22:17:23,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134732 to 88260. [2021-06-12 22:17:23,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88260 states, 88259 states have (on average 2.9363804257922705) internal successors, (259162), 88259 states have internal predecessors, (259162), 0 states have call successors, (0), 0 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 22:17:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88260 states to 88260 states and 259162 transitions. [2021-06-12 22:17:23,492 INFO L78 Accepts]: Start accepts. Automaton has 88260 states and 259162 transitions. Word has length 43 [2021-06-12 22:17:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:23,492 INFO L482 AbstractCegarLoop]: Abstraction has 88260 states and 259162 transitions. [2021-06-12 22:17:23,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:17:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 88260 states and 259162 transitions. [2021-06-12 22:17:23,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:17:23,620 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:23,620 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:23,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:23,825 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:23,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:23,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1293078010, now seen corresponding path program 157 times [2021-06-12 22:17:23,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:23,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562474267] [2021-06-12 22:17:23,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:23,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:23,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562474267] [2021-06-12 22:17:23,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562474267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:23,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679817774] [2021-06-12 22:17:23,866 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:23,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:17:23,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:23,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679817774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:23,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:23,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:17:23,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675944088] [2021-06-12 22:17:23,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:23,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:23,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:23,997 INFO L87 Difference]: Start difference. First operand 88260 states and 259162 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:17:25,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:25,122 INFO L93 Difference]: Finished difference Result 137498 states and 399912 transitions. [2021-06-12 22:17:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:17:25,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 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 43 [2021-06-12 22:17:25,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:25,390 INFO L225 Difference]: With dead ends: 137498 [2021-06-12 22:17:25,390 INFO L226 Difference]: Without dead ends: 137400 [2021-06-12 22:17:25,391 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 326.1ms TimeCoverageRelationStatistics Valid=452, Invalid=1440, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:17:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137400 states. [2021-06-12 22:17:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137400 to 89196. [2021-06-12 22:17:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89196 states, 89195 states have (on average 2.935433600538147) internal successors, (261826), 89195 states have internal predecessors, (261826), 0 states have call successors, (0), 0 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 22:17:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89196 states to 89196 states and 261826 transitions. [2021-06-12 22:17:27,689 INFO L78 Accepts]: Start accepts. Automaton has 89196 states and 261826 transitions. Word has length 43 [2021-06-12 22:17:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:27,689 INFO L482 AbstractCegarLoop]: Abstraction has 89196 states and 261826 transitions. [2021-06-12 22:17:27,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:17:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 89196 states and 261826 transitions. [2021-06-12 22:17:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:17:28,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:28,107 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:28,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:28,330 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:28,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1811390400, now seen corresponding path program 158 times [2021-06-12 22:17:28,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:28,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237098659] [2021-06-12 22:17:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:28,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:28,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237098659] [2021-06-12 22:17:28,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237098659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:28,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223114195] [2021-06-12 22:17:28,373 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:28,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:28,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:28,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:17:28,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:28,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223114195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:28,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:28,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:17:28,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488761546] [2021-06-12 22:17:28,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:28,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:28,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:28,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:28,497 INFO L87 Difference]: Start difference. First operand 89196 states and 261826 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:17:29,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:29,479 INFO L93 Difference]: Finished difference Result 130434 states and 379264 transitions. [2021-06-12 22:17:29,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:17:29,480 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 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 43 [2021-06-12 22:17:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:29,746 INFO L225 Difference]: With dead ends: 130434 [2021-06-12 22:17:29,746 INFO L226 Difference]: Without dead ends: 130364 [2021-06-12 22:17:29,747 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:17:29,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130364 states. [2021-06-12 22:17:31,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130364 to 89196. [2021-06-12 22:17:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89196 states, 89195 states have (on average 2.9345142664947588) internal successors, (261744), 89195 states have internal predecessors, (261744), 0 states have call successors, (0), 0 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 22:17:32,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89196 states to 89196 states and 261744 transitions. [2021-06-12 22:17:32,003 INFO L78 Accepts]: Start accepts. Automaton has 89196 states and 261744 transitions. Word has length 43 [2021-06-12 22:17:32,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:32,003 INFO L482 AbstractCegarLoop]: Abstraction has 89196 states and 261744 transitions. [2021-06-12 22:17:32,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:17:32,003 INFO L276 IsEmpty]: Start isEmpty. Operand 89196 states and 261744 transitions. [2021-06-12 22:17:32,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:17:32,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:32,173 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:32,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-12 22:17:32,373 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:32,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:32,374 INFO L82 PathProgramCache]: Analyzing trace with hash -939318, now seen corresponding path program 159 times [2021-06-12 22:17:32,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:32,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416969723] [2021-06-12 22:17:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:32,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:32,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416969723] [2021-06-12 22:17:32,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416969723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:32,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985780026] [2021-06-12 22:17:32,416 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:32,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 22:17:32,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:32,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:17:32,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:32,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985780026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:32,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:32,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:17:32,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663923254] [2021-06-12 22:17:32,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:17:32,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:32,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:17:32,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:17:32,546 INFO L87 Difference]: Start difference. First operand 89196 states and 261744 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 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 22:17:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:33,718 INFO L93 Difference]: Finished difference Result 104528 states and 305186 transitions. [2021-06-12 22:17:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:17:33,718 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 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) Word has length 43 [2021-06-12 22:17:33,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:33,899 INFO L225 Difference]: With dead ends: 104528 [2021-06-12 22:17:33,899 INFO L226 Difference]: Without dead ends: 104468 [2021-06-12 22:17:33,900 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=973, Invalid=2107, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:17:33,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104468 states. [2021-06-12 22:17:35,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104468 to 92172. [2021-06-12 22:17:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92172 states, 92171 states have (on average 2.933634223345738) internal successors, (270396), 92171 states have internal predecessors, (270396), 0 states have call successors, (0), 0 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 22:17:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92172 states to 92172 states and 270396 transitions. [2021-06-12 22:17:36,199 INFO L78 Accepts]: Start accepts. Automaton has 92172 states and 270396 transitions. Word has length 43 [2021-06-12 22:17:36,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:36,199 INFO L482 AbstractCegarLoop]: Abstraction has 92172 states and 270396 transitions. [2021-06-12 22:17:36,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 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 22:17:36,199 INFO L276 IsEmpty]: Start isEmpty. Operand 92172 states and 270396 transitions. [2021-06-12 22:17:36,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:17:36,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:36,359 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:36,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-12 22:17:36,559 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:36,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:36,560 INFO L82 PathProgramCache]: Analyzing trace with hash 415720322, now seen corresponding path program 160 times [2021-06-12 22:17:36,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:36,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23239923] [2021-06-12 22:17:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:36,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:36,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23239923] [2021-06-12 22:17:36,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23239923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:36,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364652738] [2021-06-12 22:17:36,596 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:36,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:36,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:36,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:17:36,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:36,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364652738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:36,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:36,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 22:17:36,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30124677] [2021-06-12 22:17:36,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:36,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:36,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:36,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:36,725 INFO L87 Difference]: Start difference. First operand 92172 states and 270396 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 22:17:38,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:38,119 INFO L93 Difference]: Finished difference Result 107768 states and 313292 transitions. [2021-06-12 22:17:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:17:38,120 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 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 43 [2021-06-12 22:17:38,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:38,336 INFO L225 Difference]: With dead ends: 107768 [2021-06-12 22:17:38,336 INFO L226 Difference]: Without dead ends: 107740 [2021-06-12 22:17:38,337 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 559.8ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:17:38,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107740 states. [2021-06-12 22:17:40,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107740 to 86702. [2021-06-12 22:17:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86702 states, 86701 states have (on average 2.93416454250816) internal successors, (254395), 86701 states have internal predecessors, (254395), 0 states have call successors, (0), 0 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 22:17:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86702 states to 86702 states and 254395 transitions. [2021-06-12 22:17:40,671 INFO L78 Accepts]: Start accepts. Automaton has 86702 states and 254395 transitions. Word has length 43 [2021-06-12 22:17:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:40,671 INFO L482 AbstractCegarLoop]: Abstraction has 86702 states and 254395 transitions. [2021-06-12 22:17:40,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 22:17:40,671 INFO L276 IsEmpty]: Start isEmpty. Operand 86702 states and 254395 transitions. [2021-06-12 22:17:40,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:17:40,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:40,796 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:40,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-12 22:17:40,996 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:40,997 INFO L82 PathProgramCache]: Analyzing trace with hash -976949870, now seen corresponding path program 161 times [2021-06-12 22:17:40,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:40,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907140702] [2021-06-12 22:17:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:41,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:41,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907140702] [2021-06-12 22:17:41,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907140702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:41,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588866215] [2021-06-12 22:17:41,040 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:41,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 22:17:41,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:41,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:17:41,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:41,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588866215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:41,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:41,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:17:41,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814178156] [2021-06-12 22:17:41,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:17:41,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:41,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:17:41,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:17:41,182 INFO L87 Difference]: Start difference. First operand 86702 states and 254395 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:17:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:42,438 INFO L93 Difference]: Finished difference Result 106763 states and 310618 transitions. [2021-06-12 22:17:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:17:42,439 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 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 43 [2021-06-12 22:17:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:42,648 INFO L225 Difference]: With dead ends: 106763 [2021-06-12 22:17:42,648 INFO L226 Difference]: Without dead ends: 106625 [2021-06-12 22:17:42,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 507.2ms TimeCoverageRelationStatistics Valid=996, Invalid=2426, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:17:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106625 states. [2021-06-12 22:17:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106625 to 89334. [2021-06-12 22:17:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89334 states, 89333 states have (on average 2.9301042168067792) internal successors, (261755), 89333 states have internal predecessors, (261755), 0 states have call successors, (0), 0 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 22:17:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89334 states to 89334 states and 261755 transitions. [2021-06-12 22:17:44,949 INFO L78 Accepts]: Start accepts. Automaton has 89334 states and 261755 transitions. Word has length 43 [2021-06-12 22:17:44,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:44,949 INFO L482 AbstractCegarLoop]: Abstraction has 89334 states and 261755 transitions. [2021-06-12 22:17:44,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:17:44,950 INFO L276 IsEmpty]: Start isEmpty. Operand 89334 states and 261755 transitions. [2021-06-12 22:17:45,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:17:45,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:45,081 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:45,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:45,285 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash -725487968, now seen corresponding path program 162 times [2021-06-12 22:17:45,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:45,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936544598] [2021-06-12 22:17:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:45,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:45,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936544598] [2021-06-12 22:17:45,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936544598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:45,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830381385] [2021-06-12 22:17:45,336 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:45,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 22:17:45,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:45,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:17:45,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:45,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830381385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:45,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:45,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-12 22:17:45,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181242487] [2021-06-12 22:17:45,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:45,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:45,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:45,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:45,489 INFO L87 Difference]: Start difference. First operand 89334 states and 261755 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 22:17:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:47,053 INFO L93 Difference]: Finished difference Result 113867 states and 330296 transitions. [2021-06-12 22:17:47,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 22:17:47,053 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 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 43 [2021-06-12 22:17:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:47,349 INFO L225 Difference]: With dead ends: 113867 [2021-06-12 22:17:47,349 INFO L226 Difference]: Without dead ends: 113832 [2021-06-12 22:17:47,349 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 621.7ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:17:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113832 states. [2021-06-12 22:17:49,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113832 to 94432. [2021-06-12 22:17:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94432 states, 94431 states have (on average 2.931727928328621) internal successors, (276846), 94431 states have internal predecessors, (276846), 0 states have call successors, (0), 0 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 22:17:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94432 states to 94432 states and 276846 transitions. [2021-06-12 22:17:49,800 INFO L78 Accepts]: Start accepts. Automaton has 94432 states and 276846 transitions. Word has length 43 [2021-06-12 22:17:49,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:49,800 INFO L482 AbstractCegarLoop]: Abstraction has 94432 states and 276846 transitions. [2021-06-12 22:17:49,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 22:17:49,800 INFO L276 IsEmpty]: Start isEmpty. Operand 94432 states and 276846 transitions. [2021-06-12 22:17:49,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:17:49,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:49,928 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:50,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-12 22:17:50,129 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:50,129 INFO L82 PathProgramCache]: Analyzing trace with hash -378710582, now seen corresponding path program 163 times [2021-06-12 22:17:50,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:50,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272007939] [2021-06-12 22:17:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:50,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:50,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272007939] [2021-06-12 22:17:50,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272007939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:50,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731393212] [2021-06-12 22:17:50,174 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:50,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:17:50,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:50,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731393212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:50,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:50,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:17:50,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895461850] [2021-06-12 22:17:50,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:17:50,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:50,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:17:50,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:17:50,328 INFO L87 Difference]: Start difference. First operand 94432 states and 276846 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 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 22:17:51,071 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-12 22:17:51,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:51,616 INFO L93 Difference]: Finished difference Result 114703 states and 333022 transitions. [2021-06-12 22:17:51,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:17:51,616 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 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) Word has length 43 [2021-06-12 22:17:51,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:51,843 INFO L225 Difference]: With dead ends: 114703 [2021-06-12 22:17:51,843 INFO L226 Difference]: Without dead ends: 114511 [2021-06-12 22:17:51,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 859.8ms TimeCoverageRelationStatistics Valid=1034, Invalid=2748, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:17:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114511 states. [2021-06-12 22:17:53,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114511 to 99458. [2021-06-12 22:17:53,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99458 states, 99457 states have (on average 2.9280090893551987) internal successors, (291211), 99457 states have internal predecessors, (291211), 0 states have call successors, (0), 0 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 22:17:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99458 states to 99458 states and 291211 transitions. [2021-06-12 22:17:54,185 INFO L78 Accepts]: Start accepts. Automaton has 99458 states and 291211 transitions. Word has length 43 [2021-06-12 22:17:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:54,185 INFO L482 AbstractCegarLoop]: Abstraction has 99458 states and 291211 transitions. [2021-06-12 22:17:54,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 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 22:17:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 99458 states and 291211 transitions. [2021-06-12 22:17:54,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:17:54,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:54,687 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:54,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:54,913 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:54,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:54,913 INFO L82 PathProgramCache]: Analyzing trace with hash 499459778, now seen corresponding path program 164 times [2021-06-12 22:17:54,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:54,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646462791] [2021-06-12 22:17:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:54,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:54,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646462791] [2021-06-12 22:17:54,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646462791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:54,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623215470] [2021-06-12 22:17:54,940 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:54,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:54,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:54,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:17:54,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:55,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623215470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:55,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:55,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-12 22:17:55,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4227836] [2021-06-12 22:17:55,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:55,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:55,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:55,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:55,086 INFO L87 Difference]: Start difference. First operand 99458 states and 291211 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:17:56,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:56,488 INFO L93 Difference]: Finished difference Result 134026 states and 389085 transitions. [2021-06-12 22:17:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:17:56,488 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 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 43 [2021-06-12 22:17:56,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:56,720 INFO L225 Difference]: With dead ends: 134026 [2021-06-12 22:17:56,720 INFO L226 Difference]: Without dead ends: 133998 [2021-06-12 22:17:56,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 611.4ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:17:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133998 states. [2021-06-12 22:17:58,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133998 to 114908. [2021-06-12 22:17:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114908 states, 114907 states have (on average 2.922328491736796) internal successors, (335796), 114907 states have internal predecessors, (335796), 0 states have call successors, (0), 0 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 22:17:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114908 states to 114908 states and 335796 transitions. [2021-06-12 22:17:59,739 INFO L78 Accepts]: Start accepts. Automaton has 114908 states and 335796 transitions. Word has length 43 [2021-06-12 22:17:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:59,739 INFO L482 AbstractCegarLoop]: Abstraction has 114908 states and 335796 transitions. [2021-06-12 22:17:59,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:17:59,740 INFO L276 IsEmpty]: Start isEmpty. Operand 114908 states and 335796 transitions. [2021-06-12 22:17:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:17:59,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:59,895 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:00,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:00,096 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:00,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:00,096 INFO L82 PathProgramCache]: Analyzing trace with hash 223084418, now seen corresponding path program 165 times [2021-06-12 22:18:00,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:00,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546740430] [2021-06-12 22:18:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:00,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:00,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546740430] [2021-06-12 22:18:00,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546740430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:00,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6515067] [2021-06-12 22:18:00,139 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:00,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:18:00,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:00,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:00,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:00,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6515067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:00,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:00,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 22:18:00,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371776343] [2021-06-12 22:18:00,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:18:00,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:00,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:18:00,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:18:00,270 INFO L87 Difference]: Start difference. First operand 114908 states and 335796 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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 22:18:01,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:01,256 INFO L93 Difference]: Finished difference Result 127931 states and 372783 transitions. [2021-06-12 22:18:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:18:01,256 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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) Word has length 43 [2021-06-12 22:18:01,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:01,509 INFO L225 Difference]: With dead ends: 127931 [2021-06-12 22:18:01,510 INFO L226 Difference]: Without dead ends: 127931 [2021-06-12 22:18:01,510 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:18:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127931 states. [2021-06-12 22:18:03,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127931 to 115940. [2021-06-12 22:18:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115940 states, 115939 states have (on average 2.9225368512752397) internal successors, (338836), 115939 states have internal predecessors, (338836), 0 states have call successors, (0), 0 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 22:18:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115940 states to 115940 states and 338836 transitions. [2021-06-12 22:18:04,098 INFO L78 Accepts]: Start accepts. Automaton has 115940 states and 338836 transitions. Word has length 43 [2021-06-12 22:18:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:04,098 INFO L482 AbstractCegarLoop]: Abstraction has 115940 states and 338836 transitions. [2021-06-12 22:18:04,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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 22:18:04,098 INFO L276 IsEmpty]: Start isEmpty. Operand 115940 states and 338836 transitions. [2021-06-12 22:18:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:18:04,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:04,652 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:04,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:04,877 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:04,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1001606290, now seen corresponding path program 166 times [2021-06-12 22:18:04,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:04,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287120913] [2021-06-12 22:18:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:04,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:04,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287120913] [2021-06-12 22:18:04,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287120913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:04,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841842123] [2021-06-12 22:18:04,928 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:04,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:04,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:04,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:04,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:05,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841842123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:05,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:05,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 22:18:05,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525705523] [2021-06-12 22:18:05,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:18:05,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:05,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:18:05,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:18:05,045 INFO L87 Difference]: Start difference. First operand 115940 states and 338836 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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 22:18:05,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:05,579 INFO L93 Difference]: Finished difference Result 136802 states and 396449 transitions. [2021-06-12 22:18:05,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:18:05,580 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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) Word has length 43 [2021-06-12 22:18:05,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:06,128 INFO L225 Difference]: With dead ends: 136802 [2021-06-12 22:18:06,129 INFO L226 Difference]: Without dead ends: 136730 [2021-06-12 22:18:06,129 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:18:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136730 states. [2021-06-12 22:18:07,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136730 to 115940. [2021-06-12 22:18:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115940 states, 115939 states have (on average 2.9224333485712313) internal successors, (338824), 115939 states have internal predecessors, (338824), 0 states have call successors, (0), 0 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 22:18:08,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115940 states to 115940 states and 338824 transitions. [2021-06-12 22:18:08,728 INFO L78 Accepts]: Start accepts. Automaton has 115940 states and 338824 transitions. Word has length 43 [2021-06-12 22:18:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:08,728 INFO L482 AbstractCegarLoop]: Abstraction has 115940 states and 338824 transitions. [2021-06-12 22:18:08,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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 22:18:08,729 INFO L276 IsEmpty]: Start isEmpty. Operand 115940 states and 338824 transitions. [2021-06-12 22:18:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:18:08,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:08,889 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:09,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2021-06-12 22:18:09,090 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:09,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:09,090 INFO L82 PathProgramCache]: Analyzing trace with hash 5413476, now seen corresponding path program 167 times [2021-06-12 22:18:09,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:09,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027326312] [2021-06-12 22:18:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:09,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:09,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027326312] [2021-06-12 22:18:09,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027326312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:09,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966294420] [2021-06-12 22:18:09,135 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:09,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:18:09,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:09,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:09,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:09,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966294420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:09,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:09,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:18:09,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854118034] [2021-06-12 22:18:09,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:09,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:09,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:09,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:09,256 INFO L87 Difference]: Start difference. First operand 115940 states and 338824 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:18:10,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:10,223 INFO L93 Difference]: Finished difference Result 126431 states and 367544 transitions. [2021-06-12 22:18:10,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:18:10,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 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 43 [2021-06-12 22:18:10,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:10,445 INFO L225 Difference]: With dead ends: 126431 [2021-06-12 22:18:10,445 INFO L226 Difference]: Without dead ends: 126431 [2021-06-12 22:18:10,446 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:18:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126431 states. [2021-06-12 22:18:12,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126431 to 116842. [2021-06-12 22:18:12,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116842 states, 116841 states have (on average 2.9219109730317268) internal successors, (341399), 116841 states have internal predecessors, (341399), 0 states have call successors, (0), 0 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 22:18:13,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116842 states to 116842 states and 341399 transitions. [2021-06-12 22:18:13,047 INFO L78 Accepts]: Start accepts. Automaton has 116842 states and 341399 transitions. Word has length 43 [2021-06-12 22:18:13,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:13,047 INFO L482 AbstractCegarLoop]: Abstraction has 116842 states and 341399 transitions. [2021-06-12 22:18:13,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:18:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 116842 states and 341399 transitions. [2021-06-12 22:18:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:18:13,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:13,209 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:13,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:13,409 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:13,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1165282054, now seen corresponding path program 168 times [2021-06-12 22:18:13,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:13,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371493181] [2021-06-12 22:18:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:13,857 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-12 22:18:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:13,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:13,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371493181] [2021-06-12 22:18:13,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371493181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:13,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518129788] [2021-06-12 22:18:13,867 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:13,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:18:13,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:13,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:13,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:14,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518129788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:14,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:14,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:18:14,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301728714] [2021-06-12 22:18:14,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:14,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:14,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:14,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:14,017 INFO L87 Difference]: Start difference. First operand 116842 states and 341399 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:18:14,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:14,971 INFO L93 Difference]: Finished difference Result 138518 states and 400785 transitions. [2021-06-12 22:18:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:18:14,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 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 43 [2021-06-12 22:18:14,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:15,291 INFO L225 Difference]: With dead ends: 138518 [2021-06-12 22:18:15,291 INFO L226 Difference]: Without dead ends: 138458 [2021-06-12 22:18:15,292 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 682.6ms TimeCoverageRelationStatistics Valid=373, Invalid=1109, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:18:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138458 states. [2021-06-12 22:18:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138458 to 120234. [2021-06-12 22:18:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120234 states, 120233 states have (on average 2.923947668277428) internal successors, (351555), 120233 states have internal predecessors, (351555), 0 states have call successors, (0), 0 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 22:18:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120234 states to 120234 states and 351555 transitions. [2021-06-12 22:18:18,384 INFO L78 Accepts]: Start accepts. Automaton has 120234 states and 351555 transitions. Word has length 43 [2021-06-12 22:18:18,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:18,384 INFO L482 AbstractCegarLoop]: Abstraction has 120234 states and 351555 transitions. [2021-06-12 22:18:18,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:18:18,384 INFO L276 IsEmpty]: Start isEmpty. Operand 120234 states and 351555 transitions. [2021-06-12 22:18:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:18:18,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:18,551 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:18,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-12 22:18:18,751 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:18,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1534575938, now seen corresponding path program 169 times [2021-06-12 22:18:18,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:18,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019289980] [2021-06-12 22:18:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:18,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:18,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019289980] [2021-06-12 22:18:18,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019289980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:18,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767960660] [2021-06-12 22:18:18,793 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:18,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:18,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:18,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767960660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:18,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:18,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:18:18,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374886168] [2021-06-12 22:18:18,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:18,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:18,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:18,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:18,913 INFO L87 Difference]: Start difference. First operand 120234 states and 351555 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:18:19,594 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-12 22:18:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:20,311 INFO L93 Difference]: Finished difference Result 137463 states and 399174 transitions. [2021-06-12 22:18:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:18:20,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 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 43 [2021-06-12 22:18:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:20,799 INFO L225 Difference]: With dead ends: 137463 [2021-06-12 22:18:20,799 INFO L226 Difference]: Without dead ends: 137463 [2021-06-12 22:18:20,800 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 766.0ms TimeCoverageRelationStatistics Valid=814, Invalid=1838, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:18:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137463 states. [2021-06-12 22:18:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137463 to 123758. [2021-06-12 22:18:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123758 states, 123757 states have (on average 2.921378184668342) internal successors, (361541), 123757 states have internal predecessors, (361541), 0 states have call successors, (0), 0 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 22:18:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123758 states to 123758 states and 361541 transitions. [2021-06-12 22:18:23,507 INFO L78 Accepts]: Start accepts. Automaton has 123758 states and 361541 transitions. Word has length 43 [2021-06-12 22:18:23,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:23,507 INFO L482 AbstractCegarLoop]: Abstraction has 123758 states and 361541 transitions. [2021-06-12 22:18:23,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:18:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 123758 states and 361541 transitions. [2021-06-12 22:18:23,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:18:23,676 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:23,676 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:23,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-12 22:18:23,877 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:23,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:23,877 INFO L82 PathProgramCache]: Analyzing trace with hash -268885396, now seen corresponding path program 170 times [2021-06-12 22:18:23,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:23,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24304035] [2021-06-12 22:18:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:23,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:23,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24304035] [2021-06-12 22:18:23,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24304035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:23,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765785925] [2021-06-12 22:18:23,921 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:23,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:23,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:23,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:23,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:24,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765785925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:24,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:24,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:18:24,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269805505] [2021-06-12 22:18:24,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:24,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:24,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:24,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:24,047 INFO L87 Difference]: Start difference. First operand 123758 states and 361541 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:18:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:25,559 INFO L93 Difference]: Finished difference Result 164424 states and 477010 transitions. [2021-06-12 22:18:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:18:25,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 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 43 [2021-06-12 22:18:25,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:25,859 INFO L225 Difference]: With dead ends: 164424 [2021-06-12 22:18:25,859 INFO L226 Difference]: Without dead ends: 164340 [2021-06-12 22:18:25,860 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 348.3ms TimeCoverageRelationStatistics Valid=497, Invalid=1573, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:18:25,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164340 states. [2021-06-12 22:18:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164340 to 139180. [2021-06-12 22:18:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139180 states, 139179 states have (on average 2.9166469079386976) internal successors, (405936), 139179 states have internal predecessors, (405936), 0 states have call successors, (0), 0 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 22:18:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139180 states to 139180 states and 405936 transitions. [2021-06-12 22:18:29,067 INFO L78 Accepts]: Start accepts. Automaton has 139180 states and 405936 transitions. Word has length 43 [2021-06-12 22:18:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:29,067 INFO L482 AbstractCegarLoop]: Abstraction has 139180 states and 405936 transitions. [2021-06-12 22:18:29,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:18:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 139180 states and 405936 transitions. [2021-06-12 22:18:29,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:18:29,668 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:29,668 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:29,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-12 22:18:29,868 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:29,868 INFO L82 PathProgramCache]: Analyzing trace with hash -471353564, now seen corresponding path program 171 times [2021-06-12 22:18:29,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:29,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122482426] [2021-06-12 22:18:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:29,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:29,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122482426] [2021-06-12 22:18:29,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122482426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:29,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522081863] [2021-06-12 22:18:29,911 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:29,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:18:29,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:29,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:29,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:30,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522081863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:30,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:30,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:18:30,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616686608] [2021-06-12 22:18:30,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:30,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:30,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:30,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:30,036 INFO L87 Difference]: Start difference. First operand 139180 states and 405936 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:18:31,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:31,432 INFO L93 Difference]: Finished difference Result 166177 states and 481337 transitions. [2021-06-12 22:18:31,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:18:31,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 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 43 [2021-06-12 22:18:31,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:31,741 INFO L225 Difference]: With dead ends: 166177 [2021-06-12 22:18:31,741 INFO L226 Difference]: Without dead ends: 166177 [2021-06-12 22:18:31,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 497.7ms TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:18:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166177 states. [2021-06-12 22:18:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166177 to 144218. [2021-06-12 22:18:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144218 states, 144217 states have (on average 2.9188306510328186) internal successors, (420945), 144217 states have internal predecessors, (420945), 0 states have call successors, (0), 0 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 22:18:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144218 states to 144218 states and 420945 transitions. [2021-06-12 22:18:35,264 INFO L78 Accepts]: Start accepts. Automaton has 144218 states and 420945 transitions. Word has length 43 [2021-06-12 22:18:35,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:35,264 INFO L482 AbstractCegarLoop]: Abstraction has 144218 states and 420945 transitions. [2021-06-12 22:18:35,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:18:35,264 INFO L276 IsEmpty]: Start isEmpty. Operand 144218 states and 420945 transitions. [2021-06-12 22:18:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:18:35,474 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:35,474 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:35,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-12 22:18:35,674 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:35,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1895135802, now seen corresponding path program 172 times [2021-06-12 22:18:35,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:35,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293702857] [2021-06-12 22:18:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:35,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:35,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293702857] [2021-06-12 22:18:35,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293702857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:35,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991163721] [2021-06-12 22:18:35,716 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:35,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:35,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:35,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:35,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:35,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991163721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:35,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:35,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:18:35,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026389384] [2021-06-12 22:18:35,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:35,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:35,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:35,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:35,848 INFO L87 Difference]: Start difference. First operand 144218 states and 420945 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:18:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:37,440 INFO L93 Difference]: Finished difference Result 174051 states and 506409 transitions. [2021-06-12 22:18:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:18:37,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 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 43 [2021-06-12 22:18:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:37,770 INFO L225 Difference]: With dead ends: 174051 [2021-06-12 22:18:37,770 INFO L226 Difference]: Without dead ends: 173979 [2021-06-12 22:18:37,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 350.9ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:18:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173979 states. [2021-06-12 22:18:40,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173979 to 148690. [2021-06-12 22:18:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148690 states, 148689 states have (on average 2.920209295912946) internal successors, (434203), 148689 states have internal predecessors, (434203), 0 states have call successors, (0), 0 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 22:18:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148690 states to 148690 states and 434203 transitions. [2021-06-12 22:18:41,886 INFO L78 Accepts]: Start accepts. Automaton has 148690 states and 434203 transitions. Word has length 43 [2021-06-12 22:18:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:41,887 INFO L482 AbstractCegarLoop]: Abstraction has 148690 states and 434203 transitions. [2021-06-12 22:18:41,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:18:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 148690 states and 434203 transitions. [2021-06-12 22:18:42,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:18:42,213 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:42,213 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:42,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:42,437 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash 562421890, now seen corresponding path program 173 times [2021-06-12 22:18:42,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:42,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761497803] [2021-06-12 22:18:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:42,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:42,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761497803] [2021-06-12 22:18:42,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761497803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:42,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526294320] [2021-06-12 22:18:42,489 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:42,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:18:42,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:42,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:42,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:42,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526294320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:42,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:42,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:18:42,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493580107] [2021-06-12 22:18:42,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:42,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:42,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:42,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:42,644 INFO L87 Difference]: Start difference. First operand 148690 states and 434203 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:18:44,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:44,429 INFO L93 Difference]: Finished difference Result 170083 states and 494122 transitions. [2021-06-12 22:18:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:18:44,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 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 43 [2021-06-12 22:18:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:45,198 INFO L225 Difference]: With dead ends: 170083 [2021-06-12 22:18:45,198 INFO L226 Difference]: Without dead ends: 170083 [2021-06-12 22:18:45,199 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 610.9ms TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:18:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170083 states. [2021-06-12 22:18:48,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170083 to 155420. [2021-06-12 22:18:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155420 states, 155419 states have (on average 2.926553381504192) internal successors, (454842), 155419 states have internal predecessors, (454842), 0 states have call successors, (0), 0 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 22:18:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155420 states to 155420 states and 454842 transitions. [2021-06-12 22:18:49,114 INFO L78 Accepts]: Start accepts. Automaton has 155420 states and 454842 transitions. Word has length 43 [2021-06-12 22:18:49,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:49,114 INFO L482 AbstractCegarLoop]: Abstraction has 155420 states and 454842 transitions. [2021-06-12 22:18:49,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 22:18:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 155420 states and 454842 transitions. [2021-06-12 22:18:49,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:18:49,338 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:49,338 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:49,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-12 22:18:49,541 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:49,541 INFO L82 PathProgramCache]: Analyzing trace with hash 351724844, now seen corresponding path program 174 times [2021-06-12 22:18:49,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:49,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698453690] [2021-06-12 22:18:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:49,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:49,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698453690] [2021-06-12 22:18:49,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698453690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:49,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255698029] [2021-06-12 22:18:49,583 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:49,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:18:49,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:49,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:49,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255698029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:49,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:49,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:18:49,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886446832] [2021-06-12 22:18:49,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:49,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:49,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:49,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:49,716 INFO L87 Difference]: Start difference. First operand 155420 states and 454842 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:18:51,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:51,402 INFO L93 Difference]: Finished difference Result 180254 states and 524821 transitions. [2021-06-12 22:18:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:18:51,417 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 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 43 [2021-06-12 22:18:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:51,766 INFO L225 Difference]: With dead ends: 180254 [2021-06-12 22:18:51,766 INFO L226 Difference]: Without dead ends: 180236 [2021-06-12 22:18:51,766 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 362.7ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:18:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180236 states. [2021-06-12 22:18:54,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180236 to 158892. [2021-06-12 22:18:55,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158892 states, 158891 states have (on average 2.927528934930235) internal successors, (465158), 158891 states have internal predecessors, (465158), 0 states have call successors, (0), 0 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 22:18:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158892 states to 158892 states and 465158 transitions. [2021-06-12 22:18:55,559 INFO L78 Accepts]: Start accepts. Automaton has 158892 states and 465158 transitions. Word has length 43 [2021-06-12 22:18:55,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:55,559 INFO L482 AbstractCegarLoop]: Abstraction has 158892 states and 465158 transitions. [2021-06-12 22:18:55,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 22:18:55,559 INFO L276 IsEmpty]: Start isEmpty. Operand 158892 states and 465158 transitions. [2021-06-12 22:18:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:18:55,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:55,801 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:56,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:56,005 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1080476662, now seen corresponding path program 175 times [2021-06-12 22:18:56,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:56,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005378164] [2021-06-12 22:18:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:56,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:56,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005378164] [2021-06-12 22:18:56,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005378164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:56,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922754385] [2021-06-12 22:18:56,046 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:56,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:56,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:56,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922754385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:56,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:56,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:18:56,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924033140] [2021-06-12 22:18:56,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:56,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:56,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:56,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:56,615 INFO L87 Difference]: Start difference. First operand 158892 states and 465158 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:18:58,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:58,098 INFO L93 Difference]: Finished difference Result 178308 states and 515729 transitions. [2021-06-12 22:18:58,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:18:58,099 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 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 43 [2021-06-12 22:18:58,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:58,436 INFO L225 Difference]: With dead ends: 178308 [2021-06-12 22:18:58,437 INFO L226 Difference]: Without dead ends: 178273 [2021-06-12 22:18:58,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 607.0ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:18:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178273 states. [2021-06-12 22:19:01,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178273 to 151546. [2021-06-12 22:19:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151546 states, 151545 states have (on average 2.9152726912798177) internal successors, (441795), 151545 states have internal predecessors, (441795), 0 states have call successors, (0), 0 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 22:19:02,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151546 states to 151546 states and 441795 transitions. [2021-06-12 22:19:02,313 INFO L78 Accepts]: Start accepts. Automaton has 151546 states and 441795 transitions. Word has length 43 [2021-06-12 22:19:02,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:02,313 INFO L482 AbstractCegarLoop]: Abstraction has 151546 states and 441795 transitions. [2021-06-12 22:19:02,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:19:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 151546 states and 441795 transitions. [2021-06-12 22:19:03,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:19:03,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:03,005 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:03,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:03,205 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:03,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:03,206 INFO L82 PathProgramCache]: Analyzing trace with hash 703505508, now seen corresponding path program 176 times [2021-06-12 22:19:03,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:03,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212566435] [2021-06-12 22:19:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:03,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:03,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212566435] [2021-06-12 22:19:03,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212566435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:03,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568150080] [2021-06-12 22:19:03,247 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:03,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:03,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:03,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:19:03,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:03,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568150080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:03,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:03,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:19:03,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973254071] [2021-06-12 22:19:03,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:03,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:03,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:03,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:03,371 INFO L87 Difference]: Start difference. First operand 151546 states and 441795 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:19:04,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:04,654 INFO L93 Difference]: Finished difference Result 159858 states and 464095 transitions. [2021-06-12 22:19:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:19:04,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 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 43 [2021-06-12 22:19:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:05,256 INFO L225 Difference]: With dead ends: 159858 [2021-06-12 22:19:05,256 INFO L226 Difference]: Without dead ends: 159844 [2021-06-12 22:19:05,257 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 634.3ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:19:05,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159844 states. [2021-06-12 22:19:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159844 to 130016. [2021-06-12 22:19:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130016 states, 130015 states have (on average 2.9079413913779177) internal successors, (378076), 130015 states have internal predecessors, (378076), 0 states have call successors, (0), 0 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 22:19:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130016 states to 130016 states and 378076 transitions. [2021-06-12 22:19:08,989 INFO L78 Accepts]: Start accepts. Automaton has 130016 states and 378076 transitions. Word has length 43 [2021-06-12 22:19:08,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:08,989 INFO L482 AbstractCegarLoop]: Abstraction has 130016 states and 378076 transitions. [2021-06-12 22:19:08,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:19:08,990 INFO L276 IsEmpty]: Start isEmpty. Operand 130016 states and 378076 transitions. [2021-06-12 22:19:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:19:09,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:09,170 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:09,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:09,370 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1361898402, now seen corresponding path program 177 times [2021-06-12 22:19:09,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:09,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779215663] [2021-06-12 22:19:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:09,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:09,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779215663] [2021-06-12 22:19:09,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779215663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:09,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804448054] [2021-06-12 22:19:09,413 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:09,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:19:09,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:09,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:19:09,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:09,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804448054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:09,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:09,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:19:09,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862513281] [2021-06-12 22:19:09,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:19:09,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:09,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:19:09,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:19:09,574 INFO L87 Difference]: Start difference. First operand 130016 states and 378076 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:19:10,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:10,870 INFO L93 Difference]: Finished difference Result 144036 states and 416535 transitions. [2021-06-12 22:19:10,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:19:10,871 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 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 43 [2021-06-12 22:19:10,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:11,143 INFO L225 Difference]: With dead ends: 144036 [2021-06-12 22:19:11,143 INFO L226 Difference]: Without dead ends: 143970 [2021-06-12 22:19:11,143 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 398.7ms TimeCoverageRelationStatistics Valid=631, Invalid=1439, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:19:11,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143970 states. [2021-06-12 22:19:13,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143970 to 129574. [2021-06-12 22:19:13,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129574 states, 129573 states have (on average 2.908576632477445) internal successors, (376873), 129573 states have internal predecessors, (376873), 0 states have call successors, (0), 0 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 22:19:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129574 states to 129574 states and 376873 transitions. [2021-06-12 22:19:14,141 INFO L78 Accepts]: Start accepts. Automaton has 129574 states and 376873 transitions. Word has length 43 [2021-06-12 22:19:14,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:14,141 INFO L482 AbstractCegarLoop]: Abstraction has 129574 states and 376873 transitions. [2021-06-12 22:19:14,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:19:14,141 INFO L276 IsEmpty]: Start isEmpty. Operand 129574 states and 376873 transitions. [2021-06-12 22:19:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:19:14,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:14,291 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:14,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:14,491 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:14,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:14,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1179331944, now seen corresponding path program 178 times [2021-06-12 22:19:14,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:14,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924013112] [2021-06-12 22:19:14,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:14,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:14,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924013112] [2021-06-12 22:19:14,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924013112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:14,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705221384] [2021-06-12 22:19:14,538 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:14,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:19:14,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:19:14,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:14,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705221384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:14,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:14,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 22:19:14,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940772845] [2021-06-12 22:19:14,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:14,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:14,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:14,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:14,670 INFO L87 Difference]: Start difference. First operand 129574 states and 376873 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:19:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:16,234 INFO L93 Difference]: Finished difference Result 150350 states and 434516 transitions. [2021-06-12 22:19:16,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:19:16,234 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 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 43 [2021-06-12 22:19:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:16,507 INFO L225 Difference]: With dead ends: 150350 [2021-06-12 22:19:16,507 INFO L226 Difference]: Without dead ends: 150320 [2021-06-12 22:19:16,507 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=682, Invalid=1574, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:19:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150320 states. [2021-06-12 22:19:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150320 to 131074. [2021-06-12 22:19:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131074 states, 131073 states have (on average 2.9083564120757135) internal successors, (381207), 131073 states have internal predecessors, (381207), 0 states have call successors, (0), 0 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 22:19:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131074 states to 131074 states and 381207 transitions. [2021-06-12 22:19:19,609 INFO L78 Accepts]: Start accepts. Automaton has 131074 states and 381207 transitions. Word has length 43 [2021-06-12 22:19:19,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:19,609 INFO L482 AbstractCegarLoop]: Abstraction has 131074 states and 381207 transitions. [2021-06-12 22:19:19,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:19:19,609 INFO L276 IsEmpty]: Start isEmpty. Operand 131074 states and 381207 transitions. [2021-06-12 22:19:19,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:19:19,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:19,792 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:19,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-06-12 22:19:19,992 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:19,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:19,993 INFO L82 PathProgramCache]: Analyzing trace with hash 81707166, now seen corresponding path program 179 times [2021-06-12 22:19:19,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:19,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719702314] [2021-06-12 22:19:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:20,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:20,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719702314] [2021-06-12 22:19:20,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719702314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:20,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182379939] [2021-06-12 22:19:20,028 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:20,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:19:20,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:20,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:19:20,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:20,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182379939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:20,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:20,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 22:19:20,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381432263] [2021-06-12 22:19:20,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:20,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:20,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:20,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:20,163 INFO L87 Difference]: Start difference. First operand 131074 states and 381207 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:19:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:21,573 INFO L93 Difference]: Finished difference Result 165836 states and 478197 transitions. [2021-06-12 22:19:21,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:19:21,573 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 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 43 [2021-06-12 22:19:21,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:22,177 INFO L225 Difference]: With dead ends: 165836 [2021-06-12 22:19:22,177 INFO L226 Difference]: Without dead ends: 165824 [2021-06-12 22:19:22,178 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 725.3ms TimeCoverageRelationStatistics Valid=983, Invalid=2097, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:19:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165824 states. [2021-06-12 22:19:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165824 to 132962. [2021-06-12 22:19:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132962 states, 132961 states have (on average 2.906709486240326) internal successors, (386479), 132961 states have internal predecessors, (386479), 0 states have call successors, (0), 0 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 22:19:25,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132962 states to 132962 states and 386479 transitions. [2021-06-12 22:19:25,329 INFO L78 Accepts]: Start accepts. Automaton has 132962 states and 386479 transitions. Word has length 43 [2021-06-12 22:19:25,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:25,329 INFO L482 AbstractCegarLoop]: Abstraction has 132962 states and 386479 transitions. [2021-06-12 22:19:25,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:19:25,329 INFO L276 IsEmpty]: Start isEmpty. Operand 132962 states and 386479 transitions. [2021-06-12 22:19:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:19:25,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:25,516 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:25,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-12 22:19:25,717 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:25,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:25,717 INFO L82 PathProgramCache]: Analyzing trace with hash 981002536, now seen corresponding path program 180 times [2021-06-12 22:19:25,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:25,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532752909] [2021-06-12 22:19:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:25,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:25,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532752909] [2021-06-12 22:19:25,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532752909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:25,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851440155] [2021-06-12 22:19:25,753 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:25,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:19:25,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:19:25,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:25,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851440155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:25,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:25,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 22:19:25,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50906108] [2021-06-12 22:19:25,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:25,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:25,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:25,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:25,900 INFO L87 Difference]: Start difference. First operand 132962 states and 386479 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:19:26,692 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-12 22:19:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:27,356 INFO L93 Difference]: Finished difference Result 162439 states and 469100 transitions. [2021-06-12 22:19:27,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:19:27,356 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 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 43 [2021-06-12 22:19:27,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:27,940 INFO L225 Difference]: With dead ends: 162439 [2021-06-12 22:19:27,940 INFO L226 Difference]: Without dead ends: 162439 [2021-06-12 22:19:27,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 812.4ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:19:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162439 states. [2021-06-12 22:19:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162439 to 140434. [2021-06-12 22:19:31,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140434 states, 140433 states have (on average 2.9111462405559947) internal successors, (408821), 140433 states have internal predecessors, (408821), 0 states have call successors, (0), 0 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 22:19:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140434 states to 140434 states and 408821 transitions. [2021-06-12 22:19:31,656 INFO L78 Accepts]: Start accepts. Automaton has 140434 states and 408821 transitions. Word has length 43 [2021-06-12 22:19:31,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:31,656 INFO L482 AbstractCegarLoop]: Abstraction has 140434 states and 408821 transitions. [2021-06-12 22:19:31,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 22:19:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 140434 states and 408821 transitions. [2021-06-12 22:19:31,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:19:31,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:31,919 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:32,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-12 22:19:32,133 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:32,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1122086154, now seen corresponding path program 181 times [2021-06-12 22:19:32,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:32,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607979677] [2021-06-12 22:19:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:32,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:32,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607979677] [2021-06-12 22:19:32,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607979677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:32,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755379163] [2021-06-12 22:19:32,207 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:32,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:19:32,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:32,660 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-12 22:19:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:32,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755379163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:32,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:32,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 22:19:32,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987711231] [2021-06-12 22:19:32,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:32,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:32,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:32,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:32,843 INFO L87 Difference]: Start difference. First operand 140434 states and 408821 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 22:19:34,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:34,200 INFO L93 Difference]: Finished difference Result 157083 states and 454504 transitions. [2021-06-12 22:19:34,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:19:34,200 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 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 43 [2021-06-12 22:19:34,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:34,508 INFO L225 Difference]: With dead ends: 157083 [2021-06-12 22:19:34,508 INFO L226 Difference]: Without dead ends: 157062 [2021-06-12 22:19:34,509 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 508.9ms TimeCoverageRelationStatistics Valid=847, Invalid=1703, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:19:34,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157062 states. [2021-06-12 22:19:37,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157062 to 122230. [2021-06-12 22:19:37,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122230 states, 122229 states have (on average 2.90133274427509) internal successors, (354627), 122229 states have internal predecessors, (354627), 0 states have call successors, (0), 0 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 22:19:37,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122230 states to 122230 states and 354627 transitions. [2021-06-12 22:19:37,669 INFO L78 Accepts]: Start accepts. Automaton has 122230 states and 354627 transitions. Word has length 43 [2021-06-12 22:19:37,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:37,669 INFO L482 AbstractCegarLoop]: Abstraction has 122230 states and 354627 transitions. [2021-06-12 22:19:37,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 22:19:37,669 INFO L276 IsEmpty]: Start isEmpty. Operand 122230 states and 354627 transitions. [2021-06-12 22:19:37,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:19:37,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:37,838 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:38,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-12 22:19:38,038 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:38,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1206484928, now seen corresponding path program 182 times [2021-06-12 22:19:38,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:38,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870598256] [2021-06-12 22:19:38,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:38,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:38,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870598256] [2021-06-12 22:19:38,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870598256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:38,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609524183] [2021-06-12 22:19:38,081 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:38,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:38,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:38,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:19:38,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:38,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609524183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:38,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:38,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:19:38,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634449155] [2021-06-12 22:19:38,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:19:38,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:38,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:19:38,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:19:38,212 INFO L87 Difference]: Start difference. First operand 122230 states and 354627 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 22:19:38,724 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-12 22:19:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:39,752 INFO L93 Difference]: Finished difference Result 142842 states and 411920 transitions. [2021-06-12 22:19:39,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:19:39,753 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 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 43 [2021-06-12 22:19:39,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:40,031 INFO L225 Difference]: With dead ends: 142842 [2021-06-12 22:19:40,031 INFO L226 Difference]: Without dead ends: 142786 [2021-06-12 22:19:40,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 719.5ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:19:40,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142786 states. [2021-06-12 22:19:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142786 to 120606. [2021-06-12 22:19:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120606 states, 120605 states have (on average 2.9076489366112517) internal successors, (350677), 120605 states have internal predecessors, (350677), 0 states have call successors, (0), 0 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 22:19:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120606 states to 120606 states and 350677 transitions. [2021-06-12 22:19:42,684 INFO L78 Accepts]: Start accepts. Automaton has 120606 states and 350677 transitions. Word has length 43 [2021-06-12 22:19:42,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:42,685 INFO L482 AbstractCegarLoop]: Abstraction has 120606 states and 350677 transitions. [2021-06-12 22:19:42,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 22:19:42,685 INFO L276 IsEmpty]: Start isEmpty. Operand 120606 states and 350677 transitions. [2021-06-12 22:19:43,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:19:43,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:43,267 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:43,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-12 22:19:43,477 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:43,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1475403872, now seen corresponding path program 183 times [2021-06-12 22:19:43,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:43,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381613383] [2021-06-12 22:19:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:43,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:43,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381613383] [2021-06-12 22:19:43,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381613383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:43,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959002634] [2021-06-12 22:19:43,525 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:43,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:19:43,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:43,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:19:43,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:43,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959002634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:43,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:43,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:19:43,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233265365] [2021-06-12 22:19:43,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:19:43,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:43,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:19:43,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:19:43,668 INFO L87 Difference]: Start difference. First operand 120606 states and 350677 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 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 22:19:44,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:44,880 INFO L93 Difference]: Finished difference Result 132227 states and 382026 transitions. [2021-06-12 22:19:44,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:19:44,880 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 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) Word has length 43 [2021-06-12 22:19:44,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:45,131 INFO L225 Difference]: With dead ends: 132227 [2021-06-12 22:19:45,131 INFO L226 Difference]: Without dead ends: 132161 [2021-06-12 22:19:45,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 420.4ms TimeCoverageRelationStatistics Valid=676, Invalid=1676, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:19:45,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132161 states. [2021-06-12 22:19:47,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132161 to 119216. [2021-06-12 22:19:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119216 states, 119215 states have (on average 2.907016734471333) internal successors, (346560), 119215 states have internal predecessors, (346560), 0 states have call successors, (0), 0 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 22:19:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119216 states to 119216 states and 346560 transitions. [2021-06-12 22:19:47,655 INFO L78 Accepts]: Start accepts. Automaton has 119216 states and 346560 transitions. Word has length 43 [2021-06-12 22:19:47,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:47,655 INFO L482 AbstractCegarLoop]: Abstraction has 119216 states and 346560 transitions. [2021-06-12 22:19:47,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 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 22:19:47,655 INFO L276 IsEmpty]: Start isEmpty. Operand 119216 states and 346560 transitions. [2021-06-12 22:19:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:19:48,244 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:48,244 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:48,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:48,444 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:48,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1857040322, now seen corresponding path program 184 times [2021-06-12 22:19:48,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:48,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747498932] [2021-06-12 22:19:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:48,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:48,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747498932] [2021-06-12 22:19:48,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747498932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:48,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446619306] [2021-06-12 22:19:48,487 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:48,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:19:48,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:48,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:19:48,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:48,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446619306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:48,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:48,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 22:19:48,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397730976] [2021-06-12 22:19:48,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:19:48,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:48,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:19:48,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:19:48,648 INFO L87 Difference]: Start difference. First operand 119216 states and 346560 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 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 22:19:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:49,911 INFO L93 Difference]: Finished difference Result 148054 states and 426823 transitions. [2021-06-12 22:19:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:19:49,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 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) Word has length 43 [2021-06-12 22:19:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:50,204 INFO L225 Difference]: With dead ends: 148054 [2021-06-12 22:19:50,205 INFO L226 Difference]: Without dead ends: 148024 [2021-06-12 22:19:50,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=732, Invalid=1718, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:19:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148024 states. [2021-06-12 22:19:52,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148024 to 120930. [2021-06-12 22:19:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120930 states, 120929 states have (on average 2.9046713360732332) internal successors, (351259), 120929 states have internal predecessors, (351259), 0 states have call successors, (0), 0 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 22:19:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120930 states to 120930 states and 351259 transitions. [2021-06-12 22:19:53,249 INFO L78 Accepts]: Start accepts. Automaton has 120930 states and 351259 transitions. Word has length 43 [2021-06-12 22:19:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:53,249 INFO L482 AbstractCegarLoop]: Abstraction has 120930 states and 351259 transitions. [2021-06-12 22:19:53,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 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 22:19:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 120930 states and 351259 transitions. [2021-06-12 22:19:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:19:53,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:53,419 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:53,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:53,619 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:53,620 INFO L82 PathProgramCache]: Analyzing trace with hash 228319968, now seen corresponding path program 185 times [2021-06-12 22:19:53,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:53,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113147813] [2021-06-12 22:19:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:53,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:53,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113147813] [2021-06-12 22:19:53,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113147813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:53,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226603668] [2021-06-12 22:19:53,651 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:53,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:19:53,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:19:53,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:53,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226603668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:53,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:53,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-12 22:19:53,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659291266] [2021-06-12 22:19:53,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:53,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:53,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:53,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:53,788 INFO L87 Difference]: Start difference. First operand 120930 states and 351259 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 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 22:19:55,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:55,384 INFO L93 Difference]: Finished difference Result 167645 states and 483468 transitions. [2021-06-12 22:19:55,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:19:55,385 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 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) Word has length 43 [2021-06-12 22:19:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:55,808 INFO L225 Difference]: With dead ends: 167645 [2021-06-12 22:19:55,808 INFO L226 Difference]: Without dead ends: 167639 [2021-06-12 22:19:55,809 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=975, Invalid=1995, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:19:56,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167639 states. [2021-06-12 22:19:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167639 to 127822. [2021-06-12 22:19:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127822 states, 127821 states have (on average 2.902879808482174) internal successors, (371049), 127821 states have internal predecessors, (371049), 0 states have call successors, (0), 0 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 22:19:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127822 states to 127822 states and 371049 transitions. [2021-06-12 22:19:59,282 INFO L78 Accepts]: Start accepts. Automaton has 127822 states and 371049 transitions. Word has length 43 [2021-06-12 22:19:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:59,282 INFO L482 AbstractCegarLoop]: Abstraction has 127822 states and 371049 transitions. [2021-06-12 22:19:59,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 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 22:19:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 127822 states and 371049 transitions. [2021-06-12 22:19:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:19:59,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:59,479 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:59,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-12 22:19:59,680 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:59,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1707881602, now seen corresponding path program 186 times [2021-06-12 22:19:59,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:59,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092779448] [2021-06-12 22:19:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:59,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:59,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092779448] [2021-06-12 22:19:59,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092779448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:59,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017635210] [2021-06-12 22:19:59,714 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:59,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 22:19:59,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:59,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:19:59,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:59,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017635210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:59,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:59,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-12 22:19:59,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85282437] [2021-06-12 22:19:59,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:59,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:59,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:59,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:59,848 INFO L87 Difference]: Start difference. First operand 127822 states and 371049 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 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 22:20:01,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:01,399 INFO L93 Difference]: Finished difference Result 170745 states and 491050 transitions. [2021-06-12 22:20:01,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 22:20:01,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 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) Word has length 43 [2021-06-12 22:20:01,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:02,014 INFO L225 Difference]: With dead ends: 170745 [2021-06-12 22:20:02,014 INFO L226 Difference]: Without dead ends: 170745 [2021-06-12 22:20:02,014 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 618.4ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:20:02,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170745 states. [2021-06-12 22:20:04,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170745 to 138414. [2021-06-12 22:20:05,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138414 states, 138413 states have (on average 2.904980023552701) internal successors, (402087), 138413 states have internal predecessors, (402087), 0 states have call successors, (0), 0 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 22:20:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138414 states to 138414 states and 402087 transitions. [2021-06-12 22:20:05,468 INFO L78 Accepts]: Start accepts. Automaton has 138414 states and 402087 transitions. Word has length 43 [2021-06-12 22:20:05,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:05,468 INFO L482 AbstractCegarLoop]: Abstraction has 138414 states and 402087 transitions. [2021-06-12 22:20:05,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 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 22:20:05,468 INFO L276 IsEmpty]: Start isEmpty. Operand 138414 states and 402087 transitions. [2021-06-12 22:20:06,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:20:06,089 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:06,089 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:06,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:06,290 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:06,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:06,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1848965220, now seen corresponding path program 187 times [2021-06-12 22:20:06,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:06,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573785468] [2021-06-12 22:20:06,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:06,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:06,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573785468] [2021-06-12 22:20:06,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573785468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:06,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165318705] [2021-06-12 22:20:06,321 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:06,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:20:06,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:06,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165318705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:06,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:06,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-12 22:20:06,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322169435] [2021-06-12 22:20:06,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:20:06,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:06,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:20:06,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:20:06,453 INFO L87 Difference]: Start difference. First operand 138414 states and 402087 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 22:20:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:07,852 INFO L93 Difference]: Finished difference Result 166155 states and 478574 transitions. [2021-06-12 22:20:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:20:07,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 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 43 [2021-06-12 22:20:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:08,194 INFO L225 Difference]: With dead ends: 166155 [2021-06-12 22:20:08,194 INFO L226 Difference]: Without dead ends: 166134 [2021-06-12 22:20:08,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 480.7ms TimeCoverageRelationStatistics Valid=1030, Invalid=2162, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:20:08,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166134 states. [2021-06-12 22:20:10,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166134 to 132754. [2021-06-12 22:20:11,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132754 states, 132753 states have (on average 2.90065761225735) internal successors, (385071), 132753 states have internal predecessors, (385071), 0 states have call successors, (0), 0 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 22:20:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132754 states to 132754 states and 385071 transitions. [2021-06-12 22:20:11,884 INFO L78 Accepts]: Start accepts. Automaton has 132754 states and 385071 transitions. Word has length 43 [2021-06-12 22:20:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:11,884 INFO L482 AbstractCegarLoop]: Abstraction has 132754 states and 385071 transitions. [2021-06-12 22:20:11,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 22:20:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 132754 states and 385071 transitions. [2021-06-12 22:20:12,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:20:12,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:12,086 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:12,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:12,287 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:12,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:12,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1933363994, now seen corresponding path program 188 times [2021-06-12 22:20:12,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:12,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265929008] [2021-06-12 22:20:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:12,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:12,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265929008] [2021-06-12 22:20:12,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265929008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:12,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130070989] [2021-06-12 22:20:12,352 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:12,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:12,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:12,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:20:12,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:12,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130070989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:12,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:12,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 22:20:12,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588420061] [2021-06-12 22:20:12,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:20:12,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:12,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:20:12,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:20:12,506 INFO L87 Difference]: Start difference. First operand 132754 states and 385071 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 22:20:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:14,140 INFO L93 Difference]: Finished difference Result 165237 states and 475345 transitions. [2021-06-12 22:20:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:20:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 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 43 [2021-06-12 22:20:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:14,470 INFO L225 Difference]: With dead ends: 165237 [2021-06-12 22:20:14,470 INFO L226 Difference]: Without dead ends: 165153 [2021-06-12 22:20:14,470 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 461.7ms TimeCoverageRelationStatistics Valid=877, Invalid=1985, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:20:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165153 states. [2021-06-12 22:20:17,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165153 to 132063. [2021-06-12 22:20:17,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132063 states, 132062 states have (on average 2.9023564689312598) internal successors, (383291), 132062 states have internal predecessors, (383291), 0 states have call successors, (0), 0 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 22:20:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132063 states to 132063 states and 383291 transitions. [2021-06-12 22:20:17,739 INFO L78 Accepts]: Start accepts. Automaton has 132063 states and 383291 transitions. Word has length 43 [2021-06-12 22:20:17,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:17,740 INFO L482 AbstractCegarLoop]: Abstraction has 132063 states and 383291 transitions. [2021-06-12 22:20:17,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 22:20:17,740 INFO L276 IsEmpty]: Start isEmpty. Operand 132063 states and 383291 transitions. [2021-06-12 22:20:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:20:17,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:17,933 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:18,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:18,133 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:18,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:18,134 INFO L82 PathProgramCache]: Analyzing trace with hash -721565792, now seen corresponding path program 189 times [2021-06-12 22:20:18,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:18,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957543999] [2021-06-12 22:20:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:18,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:18,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957543999] [2021-06-12 22:20:18,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957543999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:18,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716669621] [2021-06-12 22:20:18,176 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:18,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 22:20:18,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:18,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:20:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:18,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716669621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:18,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:18,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:20:18,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59156187] [2021-06-12 22:20:18,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:20:18,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:18,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:20:18,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:20:18,315 INFO L87 Difference]: Start difference. First operand 132063 states and 383291 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 22:20:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:19,922 INFO L93 Difference]: Finished difference Result 165113 states and 474768 transitions. [2021-06-12 22:20:19,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:20:19,922 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 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 43 [2021-06-12 22:20:19,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:20,239 INFO L225 Difference]: With dead ends: 165113 [2021-06-12 22:20:20,239 INFO L226 Difference]: Without dead ends: 165015 [2021-06-12 22:20:20,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 379.9ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:20:20,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165015 states. [2021-06-12 22:20:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165015 to 133988. [2021-06-12 22:20:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133988 states, 133987 states have (on average 2.903714539470247) internal successors, (389060), 133987 states have internal predecessors, (389060), 0 states have call successors, (0), 0 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 22:20:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133988 states to 133988 states and 389060 transitions. [2021-06-12 22:20:24,047 INFO L78 Accepts]: Start accepts. Automaton has 133988 states and 389060 transitions. Word has length 43 [2021-06-12 22:20:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:24,048 INFO L482 AbstractCegarLoop]: Abstraction has 133988 states and 389060 transitions. [2021-06-12 22:20:24,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 22:20:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 133988 states and 389060 transitions. [2021-06-12 22:20:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:20:24,299 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:24,299 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:24,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:24,513 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:24,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:24,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1517368606, now seen corresponding path program 190 times [2021-06-12 22:20:24,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:24,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510703719] [2021-06-12 22:20:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:24,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:24,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510703719] [2021-06-12 22:20:24,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510703719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:24,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801662379] [2021-06-12 22:20:24,564 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:24,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:24,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:24,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:20:24,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:24,967 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-12 22:20:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:25,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801662379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:25,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:25,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:20:25,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90208748] [2021-06-12 22:20:25,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:20:25,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:25,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:20:25,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:20:25,146 INFO L87 Difference]: Start difference. First operand 133988 states and 389060 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 22:20:26,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:26,534 INFO L93 Difference]: Finished difference Result 149805 states and 432340 transitions. [2021-06-12 22:20:26,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:20:26,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 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 43 [2021-06-12 22:20:26,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:26,847 INFO L225 Difference]: With dead ends: 149805 [2021-06-12 22:20:26,848 INFO L226 Difference]: Without dead ends: 149739 [2021-06-12 22:20:26,848 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 939.4ms TimeCoverageRelationStatistics Valid=708, Invalid=1842, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:20:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149739 states. [2021-06-12 22:20:29,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149739 to 136196. [2021-06-12 22:20:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136196 states, 136195 states have (on average 2.900356107052388) internal successors, (395014), 136195 states have internal predecessors, (395014), 0 states have call successors, (0), 0 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 22:20:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136196 states to 136196 states and 395014 transitions. [2021-06-12 22:20:30,064 INFO L78 Accepts]: Start accepts. Automaton has 136196 states and 395014 transitions. Word has length 43 [2021-06-12 22:20:30,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:30,064 INFO L482 AbstractCegarLoop]: Abstraction has 136196 states and 395014 transitions. [2021-06-12 22:20:30,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 22:20:30,064 INFO L276 IsEmpty]: Start isEmpty. Operand 136196 states and 395014 transitions. [2021-06-12 22:20:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:20:30,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:30,265 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:30,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-12 22:20:30,465 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:30,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:30,465 INFO L82 PathProgramCache]: Analyzing trace with hash 826070824, now seen corresponding path program 191 times [2021-06-12 22:20:30,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:30,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913444134] [2021-06-12 22:20:30,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:30,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:30,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913444134] [2021-06-12 22:20:30,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913444134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:30,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405219157] [2021-06-12 22:20:30,502 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:30,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:20:30,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:30,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:20:30,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:30,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405219157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:30,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:30,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 22:20:30,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840200068] [2021-06-12 22:20:30,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:20:30,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:30,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:20:30,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:20:30,654 INFO L87 Difference]: Start difference. First operand 136196 states and 395014 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 22:20:32,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:32,398 INFO L93 Difference]: Finished difference Result 170919 states and 492163 transitions. [2021-06-12 22:20:32,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:20:32,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 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 43 [2021-06-12 22:20:32,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:32,718 INFO L225 Difference]: With dead ends: 170919 [2021-06-12 22:20:32,718 INFO L226 Difference]: Without dead ends: 170889 [2021-06-12 22:20:32,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 482.8ms TimeCoverageRelationStatistics Valid=809, Invalid=2053, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:20:32,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170889 states. [2021-06-12 22:20:35,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170889 to 142906. [2021-06-12 22:20:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142906 states, 142905 states have (on average 2.900143451943599) internal successors, (414445), 142905 states have internal predecessors, (414445), 0 states have call successors, (0), 0 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 22:20:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142906 states to 142906 states and 414445 transitions. [2021-06-12 22:20:36,072 INFO L78 Accepts]: Start accepts. Automaton has 142906 states and 414445 transitions. Word has length 43 [2021-06-12 22:20:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:36,072 INFO L482 AbstractCegarLoop]: Abstraction has 142906 states and 414445 transitions. [2021-06-12 22:20:36,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 22:20:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 142906 states and 414445 transitions. [2021-06-12 22:20:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:20:36,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:36,698 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:36,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-12 22:20:36,899 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:36,899 INFO L82 PathProgramCache]: Analyzing trace with hash -11435682, now seen corresponding path program 192 times [2021-06-12 22:20:36,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:36,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72743221] [2021-06-12 22:20:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:36,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:36,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72743221] [2021-06-12 22:20:36,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72743221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:36,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660580557] [2021-06-12 22:20:36,930 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:36,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:20:36,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:36,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:20:36,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:37,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660580557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:37,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:37,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 22:20:37,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223090957] [2021-06-12 22:20:37,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:20:37,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:37,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:20:37,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:20:37,077 INFO L87 Difference]: Start difference. First operand 142906 states and 414445 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 22:20:38,038 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-12 22:20:38,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:38,574 INFO L93 Difference]: Finished difference Result 189714 states and 547144 transitions. [2021-06-12 22:20:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:20:38,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 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 43 [2021-06-12 22:20:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:39,249 INFO L225 Difference]: With dead ends: 189714 [2021-06-12 22:20:39,250 INFO L226 Difference]: Without dead ends: 189708 [2021-06-12 22:20:39,250 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 763.7ms TimeCoverageRelationStatistics Valid=1227, Invalid=2679, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:20:39,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189708 states. [2021-06-12 22:20:42,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189708 to 154668. [2021-06-12 22:20:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154668 states, 154667 states have (on average 2.8988601317669573) internal successors, (448358), 154667 states have internal predecessors, (448358), 0 states have call successors, (0), 0 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 22:20:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154668 states to 154668 states and 448358 transitions. [2021-06-12 22:20:43,244 INFO L78 Accepts]: Start accepts. Automaton has 154668 states and 448358 transitions. Word has length 43 [2021-06-12 22:20:43,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:43,244 INFO L482 AbstractCegarLoop]: Abstraction has 154668 states and 448358 transitions. [2021-06-12 22:20:43,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 22:20:43,244 INFO L276 IsEmpty]: Start isEmpty. Operand 154668 states and 448358 transitions. [2021-06-12 22:20:43,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:20:43,457 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:43,457 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:43,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-12 22:20:43,658 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:43,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:43,658 INFO L82 PathProgramCache]: Analyzing trace with hash 937030376, now seen corresponding path program 193 times [2021-06-12 22:20:43,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:43,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004389017] [2021-06-12 22:20:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:43,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:43,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004389017] [2021-06-12 22:20:43,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004389017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:43,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630711364] [2021-06-12 22:20:43,690 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:43,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:20:43,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:43,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630711364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:43,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:43,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-12 22:20:43,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538606752] [2021-06-12 22:20:43,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:20:43,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:43,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:20:43,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:20:43,829 INFO L87 Difference]: Start difference. First operand 154668 states and 448358 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 22:20:45,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:45,869 INFO L93 Difference]: Finished difference Result 222961 states and 642150 transitions. [2021-06-12 22:20:45,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:20:45,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 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 43 [2021-06-12 22:20:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:46,326 INFO L225 Difference]: With dead ends: 222961 [2021-06-12 22:20:46,326 INFO L226 Difference]: Without dead ends: 222961 [2021-06-12 22:20:46,327 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 599.5ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:20:46,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222961 states. [2021-06-12 22:20:51,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222961 to 194204. [2021-06-12 22:20:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194204 states, 194203 states have (on average 2.8963198302806856) internal successors, (562474), 194203 states have internal predecessors, (562474), 0 states have call successors, (0), 0 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 22:20:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194204 states to 194204 states and 562474 transitions. [2021-06-12 22:20:52,310 INFO L78 Accepts]: Start accepts. Automaton has 194204 states and 562474 transitions. Word has length 43 [2021-06-12 22:20:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:52,311 INFO L482 AbstractCegarLoop]: Abstraction has 194204 states and 562474 transitions. [2021-06-12 22:20:52,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 22:20:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 194204 states and 562474 transitions. [2021-06-12 22:20:53,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:20:53,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:53,034 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:53,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:53,234 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:53,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:53,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1078113994, now seen corresponding path program 194 times [2021-06-12 22:20:53,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:53,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348110179] [2021-06-12 22:20:53,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:53,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:53,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348110179] [2021-06-12 22:20:53,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348110179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:53,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676980124] [2021-06-12 22:20:53,262 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:53,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:53,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:53,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:20:53,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:53,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676980124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:53,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:53,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-12 22:20:53,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198326805] [2021-06-12 22:20:53,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:20:53,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:53,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:20:53,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:20:53,417 INFO L87 Difference]: Start difference. First operand 194204 states and 562474 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:20:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:54,981 INFO L93 Difference]: Finished difference Result 220222 states and 634358 transitions. [2021-06-12 22:20:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:20:54,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 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 43 [2021-06-12 22:20:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:55,728 INFO L225 Difference]: With dead ends: 220222 [2021-06-12 22:20:55,728 INFO L226 Difference]: Without dead ends: 220208 [2021-06-12 22:20:55,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 520.6ms TimeCoverageRelationStatistics Valid=1091, Invalid=2449, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:20:55,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220208 states. [2021-06-12 22:20:59,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220208 to 192400. [2021-06-12 22:20:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192400 states, 192399 states have (on average 2.8951605777576805) internal successors, (557026), 192399 states have internal predecessors, (557026), 0 states have call successors, (0), 0 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 22:21:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192400 states to 192400 states and 557026 transitions. [2021-06-12 22:21:00,367 INFO L78 Accepts]: Start accepts. Automaton has 192400 states and 557026 transitions. Word has length 43 [2021-06-12 22:21:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:00,367 INFO L482 AbstractCegarLoop]: Abstraction has 192400 states and 557026 transitions. [2021-06-12 22:21:00,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:21:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 192400 states and 557026 transitions. [2021-06-12 22:21:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:21:01,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:01,115 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:01,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:01,315 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:01,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:01,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1162512768, now seen corresponding path program 195 times [2021-06-12 22:21:01,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:01,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277512722] [2021-06-12 22:21:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:01,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:01,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277512722] [2021-06-12 22:21:01,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277512722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:01,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390155748] [2021-06-12 22:21:01,347 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:01,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:21:01,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:01,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:21:01,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:01,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390155748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:01,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:01,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 22:21:01,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791464305] [2021-06-12 22:21:01,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:21:01,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:01,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:21:01,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:21:01,487 INFO L87 Difference]: Start difference. First operand 192400 states and 557026 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:21:03,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:03,125 INFO L93 Difference]: Finished difference Result 221539 states and 638003 transitions. [2021-06-12 22:21:03,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:21:03,125 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 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 43 [2021-06-12 22:21:03,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:03,913 INFO L225 Difference]: With dead ends: 221539 [2021-06-12 22:21:03,913 INFO L226 Difference]: Without dead ends: 221483 [2021-06-12 22:21:03,913 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 474.9ms TimeCoverageRelationStatistics Valid=940, Invalid=2252, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:21:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221483 states. [2021-06-12 22:21:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221483 to 195688. [2021-06-12 22:21:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195688 states, 195687 states have (on average 2.894111514817029) internal successors, (566340), 195687 states have internal predecessors, (566340), 0 states have call successors, (0), 0 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 22:21:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195688 states to 195688 states and 566340 transitions. [2021-06-12 22:21:09,151 INFO L78 Accepts]: Start accepts. Automaton has 195688 states and 566340 transitions. Word has length 43 [2021-06-12 22:21:09,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:09,151 INFO L482 AbstractCegarLoop]: Abstraction has 195688 states and 566340 transitions. [2021-06-12 22:21:09,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:21:09,151 INFO L276 IsEmpty]: Start isEmpty. Operand 195688 states and 566340 transitions. [2021-06-12 22:21:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:21:09,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:09,446 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:09,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-12 22:21:09,647 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:09,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1492417018, now seen corresponding path program 196 times [2021-06-12 22:21:09,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:09,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822573951] [2021-06-12 22:21:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:09,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:09,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822573951] [2021-06-12 22:21:09,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822573951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:09,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221433771] [2021-06-12 22:21:09,685 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:09,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:09,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:09,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:21:09,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:09,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221433771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:09,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:09,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 22:21:09,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159055825] [2021-06-12 22:21:09,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:09,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:09,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:09,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:09,841 INFO L87 Difference]: Start difference. First operand 195688 states and 566340 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:21:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:11,807 INFO L93 Difference]: Finished difference Result 229009 states and 659218 transitions. [2021-06-12 22:21:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:21:11,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 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 43 [2021-06-12 22:21:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:12,822 INFO L225 Difference]: With dead ends: 229009 [2021-06-12 22:21:12,822 INFO L226 Difference]: Without dead ends: 228911 [2021-06-12 22:21:12,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 443.0ms TimeCoverageRelationStatistics Valid=806, Invalid=2056, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:21:13,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228911 states. [2021-06-12 22:21:17,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228911 to 202580. [2021-06-12 22:21:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202580 states, 202579 states have (on average 2.892817123196383) internal successors, (586024), 202579 states have internal predecessors, (586024), 0 states have call successors, (0), 0 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 22:21:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202580 states to 202580 states and 586024 transitions. [2021-06-12 22:21:18,636 INFO L78 Accepts]: Start accepts. Automaton has 202580 states and 586024 transitions. Word has length 43 [2021-06-12 22:21:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:18,637 INFO L482 AbstractCegarLoop]: Abstraction has 202580 states and 586024 transitions. [2021-06-12 22:21:18,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:21:18,637 INFO L276 IsEmpty]: Start isEmpty. Operand 202580 states and 586024 transitions. [2021-06-12 22:21:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 22:21:18,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:18,909 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:19,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:19,110 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:19,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:19,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1612051392, now seen corresponding path program 197 times [2021-06-12 22:21:19,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:19,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398575549] [2021-06-12 22:21:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:19,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:19,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398575549] [2021-06-12 22:21:19,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398575549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:19,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067062500] [2021-06-12 22:21:19,155 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:19,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:21:19,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:19,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:21:19,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:19,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067062500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:19,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:19,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:21:19,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778909366] [2021-06-12 22:21:19,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:19,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:19,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:19,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:19,307 INFO L87 Difference]: Start difference. First operand 202580 states and 586024 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:21:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:21,081 INFO L93 Difference]: Finished difference Result 232294 states and 668787 transitions. [2021-06-12 22:21:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:21:21,081 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 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 43 [2021-06-12 22:21:21,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:21,567 INFO L225 Difference]: With dead ends: 232294 [2021-06-12 22:21:21,567 INFO L226 Difference]: Without dead ends: 232154 [2021-06-12 22:21:21,567 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 680.5ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:21:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232154 states. [2021-06-12 22:21:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232154 to 206255. [2021-06-12 22:21:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206255 states, 206254 states have (on average 2.892002094504834) internal successors, (596487), 206254 states have internal predecessors, (596487), 0 states have call successors, (0), 0 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 22:21:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206255 states to 206255 states and 596487 transitions. [2021-06-12 22:21:26,873 INFO L78 Accepts]: Start accepts. Automaton has 206255 states and 596487 transitions. Word has length 43 [2021-06-12 22:21:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:26,873 INFO L482 AbstractCegarLoop]: Abstraction has 206255 states and 596487 transitions. [2021-06-12 22:21:26,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:21:26,873 INFO L276 IsEmpty]: Start isEmpty. Operand 206255 states and 596487 transitions. [2021-06-12 22:21:27,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 22:21:27,579 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:27,579 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:27,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:27,803 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:27,803 INFO L82 PathProgramCache]: Analyzing trace with hash 993831136, now seen corresponding path program 198 times [2021-06-12 22:21:27,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:27,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313545849] [2021-06-12 22:21:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:27,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:27,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313545849] [2021-06-12 22:21:27,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313545849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:27,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056355809] [2021-06-12 22:21:27,992 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:28,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:21:28,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:28,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:21:28,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:28,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056355809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:28,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:28,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-06-12 22:21:28,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454102274] [2021-06-12 22:21:28,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:21:28,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:28,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:21:28,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:21:28,236 INFO L87 Difference]: Start difference. First operand 206255 states and 596487 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 22:21:30,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:30,065 INFO L93 Difference]: Finished difference Result 283800 states and 818276 transitions. [2021-06-12 22:21:30,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:21:30,065 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 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 46 [2021-06-12 22:21:30,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:30,713 INFO L225 Difference]: With dead ends: 283800 [2021-06-12 22:21:30,713 INFO L226 Difference]: Without dead ends: 283762 [2021-06-12 22:21:30,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 458.2ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:21:31,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283762 states. [2021-06-12 22:21:34,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283762 to 206283. [2021-06-12 22:21:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206283 states, 206282 states have (on average 2.8919004081790947) internal successors, (596547), 206282 states have internal predecessors, (596547), 0 states have call successors, (0), 0 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 22:21:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206283 states to 206283 states and 596547 transitions. [2021-06-12 22:21:36,189 INFO L78 Accepts]: Start accepts. Automaton has 206283 states and 596547 transitions. Word has length 46 [2021-06-12 22:21:36,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:36,189 INFO L482 AbstractCegarLoop]: Abstraction has 206283 states and 596547 transitions. [2021-06-12 22:21:36,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 22:21:36,189 INFO L276 IsEmpty]: Start isEmpty. Operand 206283 states and 596547 transitions. [2021-06-12 22:21:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 22:21:36,705 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:36,705 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:36,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:36,921 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:36,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:36,921 INFO L82 PathProgramCache]: Analyzing trace with hash -290942774, now seen corresponding path program 199 times [2021-06-12 22:21:36,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:36,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120715698] [2021-06-12 22:21:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:37,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:37,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120715698] [2021-06-12 22:21:37,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120715698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:37,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638774754] [2021-06-12 22:21:37,111 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:37,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:21:37,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:37,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638774754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:37,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:37,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 22:21:37,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870433934] [2021-06-12 22:21:37,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:21:37,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:37,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:21:37,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:21:37,394 INFO L87 Difference]: Start difference. First operand 206283 states and 596547 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:21:39,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:39,959 INFO L93 Difference]: Finished difference Result 306545 states and 884487 transitions. [2021-06-12 22:21:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:21:39,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 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 46 [2021-06-12 22:21:39,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:41,153 INFO L225 Difference]: With dead ends: 306545 [2021-06-12 22:21:41,153 INFO L226 Difference]: Without dead ends: 306463 [2021-06-12 22:21:41,154 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:21:41,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306463 states. [2021-06-12 22:21:45,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306463 to 226606. [2021-06-12 22:21:46,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226606 states, 226605 states have (on average 2.8947110610975044) internal successors, (655956), 226605 states have internal predecessors, (655956), 0 states have call successors, (0), 0 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 22:21:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226606 states to 226606 states and 655956 transitions. [2021-06-12 22:21:47,284 INFO L78 Accepts]: Start accepts. Automaton has 226606 states and 655956 transitions. Word has length 46 [2021-06-12 22:21:47,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:47,284 INFO L482 AbstractCegarLoop]: Abstraction has 226606 states and 655956 transitions. [2021-06-12 22:21:47,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:21:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 226606 states and 655956 transitions. [2021-06-12 22:21:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 22:21:47,669 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:47,669 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:47,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:47,870 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:47,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:47,870 INFO L82 PathProgramCache]: Analyzing trace with hash 305163142, now seen corresponding path program 200 times [2021-06-12 22:21:47,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:47,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982464249] [2021-06-12 22:21:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:48,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:48,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982464249] [2021-06-12 22:21:48,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982464249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:48,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286631720] [2021-06-12 22:21:48,025 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:48,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:48,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:48,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:21:48,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:48,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286631720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:48,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:48,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 22:21:48,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908282970] [2021-06-12 22:21:48,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:21:48,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:48,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:21:48,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:21:48,254 INFO L87 Difference]: Start difference. First operand 226606 states and 655956 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:21:50,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:50,320 INFO L93 Difference]: Finished difference Result 306514 states and 884419 transitions. [2021-06-12 22:21:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:21:50,320 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 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 46 [2021-06-12 22:21:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:51,374 INFO L225 Difference]: With dead ends: 306514 [2021-06-12 22:21:51,374 INFO L226 Difference]: Without dead ends: 306402 [2021-06-12 22:21:51,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 728.8ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:21:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306402 states. [2021-06-12 22:21:56,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306402 to 223282. [2021-06-12 22:21:56,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223282 states, 223281 states have (on average 2.892543476605712) internal successors, (645850), 223281 states have internal predecessors, (645850), 0 states have call successors, (0), 0 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 22:21:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223282 states to 223282 states and 645850 transitions. [2021-06-12 22:21:57,938 INFO L78 Accepts]: Start accepts. Automaton has 223282 states and 645850 transitions. Word has length 46 [2021-06-12 22:21:57,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:57,938 INFO L482 AbstractCegarLoop]: Abstraction has 223282 states and 645850 transitions. [2021-06-12 22:21:57,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:21:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 223282 states and 645850 transitions. [2021-06-12 22:21:58,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 22:21:58,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:58,472 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:58,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:58,696 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:58,696 INFO L82 PathProgramCache]: Analyzing trace with hash -752360386, now seen corresponding path program 201 times [2021-06-12 22:21:58,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:58,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160346519] [2021-06-12 22:21:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:58,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:58,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160346519] [2021-06-12 22:21:58,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160346519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:58,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869919583] [2021-06-12 22:21:58,889 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:58,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:21:58,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:58,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:21:58,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:59,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869919583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:59,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:59,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-06-12 22:21:59,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739300966] [2021-06-12 22:21:59,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:21:59,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:59,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:21:59,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:21:59,206 INFO L87 Difference]: Start difference. First operand 223282 states and 645850 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:22:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:01,734 INFO L93 Difference]: Finished difference Result 306804 states and 884969 transitions. [2021-06-12 22:22:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:22:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 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 46 [2021-06-12 22:22:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:02,776 INFO L225 Difference]: With dead ends: 306804 [2021-06-12 22:22:02,776 INFO L226 Difference]: Without dead ends: 306680 [2021-06-12 22:22:02,776 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 882.6ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:22:03,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306680 states. [2021-06-12 22:22:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306680 to 225174. [2021-06-12 22:22:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225174 states, 225173 states have (on average 2.8930644437832242) internal successors, (651440), 225173 states have internal predecessors, (651440), 0 states have call successors, (0), 0 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 22:22:08,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225174 states to 225174 states and 651440 transitions. [2021-06-12 22:22:08,281 INFO L78 Accepts]: Start accepts. Automaton has 225174 states and 651440 transitions. Word has length 46 [2021-06-12 22:22:08,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:08,281 INFO L482 AbstractCegarLoop]: Abstraction has 225174 states and 651440 transitions. [2021-06-12 22:22:08,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:22:08,281 INFO L276 IsEmpty]: Start isEmpty. Operand 225174 states and 651440 transitions. [2021-06-12 22:22:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 22:22:08,639 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:08,639 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:08,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-12 22:22:08,840 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:08,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:08,840 INFO L82 PathProgramCache]: Analyzing trace with hash 426214436, now seen corresponding path program 202 times [2021-06-12 22:22:08,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:08,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673079961] [2021-06-12 22:22:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:09,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:09,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673079961] [2021-06-12 22:22:09,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673079961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:09,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344062195] [2021-06-12 22:22:09,395 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:09,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:09,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:09,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:22:09,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:09,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344062195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:09,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:09,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 22:22:09,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321036624] [2021-06-12 22:22:09,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:22:09,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:09,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:22:09,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:22:09,624 INFO L87 Difference]: Start difference. First operand 225174 states and 651440 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:22:11,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:11,487 INFO L93 Difference]: Finished difference Result 307154 states and 885951 transitions. [2021-06-12 22:22:11,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:22:11,488 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 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 46 [2021-06-12 22:22:11,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:12,171 INFO L225 Difference]: With dead ends: 307154 [2021-06-12 22:22:12,171 INFO L226 Difference]: Without dead ends: 307024 [2021-06-12 22:22:12,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 323.5ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:22:12,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307024 states. [2021-06-12 22:22:16,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307024 to 226798. [2021-06-12 22:22:17,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226798 states, 226797 states have (on average 2.893636159208455) internal successors, (656268), 226797 states have internal predecessors, (656268), 0 states have call successors, (0), 0 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 22:22:18,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226798 states to 226798 states and 656268 transitions. [2021-06-12 22:22:18,739 INFO L78 Accepts]: Start accepts. Automaton has 226798 states and 656268 transitions. Word has length 46 [2021-06-12 22:22:18,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:18,739 INFO L482 AbstractCegarLoop]: Abstraction has 226798 states and 656268 transitions. [2021-06-12 22:22:18,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:22:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 226798 states and 656268 transitions. [2021-06-12 22:22:19,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 22:22:19,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:19,685 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:19,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-12 22:22:19,885 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:19,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:19,885 INFO L82 PathProgramCache]: Analyzing trace with hash -8908162, now seen corresponding path program 203 times [2021-06-12 22:22:19,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:19,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038114029] [2021-06-12 22:22:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:20,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:20,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038114029] [2021-06-12 22:22:20,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038114029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:20,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478252011] [2021-06-12 22:22:20,165 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:20,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:22:20,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:20,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:22:20,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:20,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478252011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:20,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:20,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 22:22:20,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473906782] [2021-06-12 22:22:20,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:22:20,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:20,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:22:20,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:22:20,451 INFO L87 Difference]: Start difference. First operand 226798 states and 656268 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:22:22,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:22,432 INFO L93 Difference]: Finished difference Result 307138 states and 885982 transitions. [2021-06-12 22:22:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:22:22,433 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 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 46 [2021-06-12 22:22:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:23,106 INFO L225 Difference]: With dead ends: 307138 [2021-06-12 22:22:23,106 INFO L226 Difference]: Without dead ends: 307062 [2021-06-12 22:22:23,106 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 414.5ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:22:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307062 states. [2021-06-12 22:22:27,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307062 to 227686. [2021-06-12 22:22:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227686 states, 227685 states have (on average 2.8936644926104047) internal successors, (658844), 227685 states have internal predecessors, (658844), 0 states have call successors, (0), 0 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 22:22:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227686 states to 227686 states and 658844 transitions. [2021-06-12 22:22:28,739 INFO L78 Accepts]: Start accepts. Automaton has 227686 states and 658844 transitions. Word has length 46 [2021-06-12 22:22:28,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:28,739 INFO L482 AbstractCegarLoop]: Abstraction has 227686 states and 658844 transitions. [2021-06-12 22:22:28,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:22:28,739 INFO L276 IsEmpty]: Start isEmpty. Operand 227686 states and 658844 transitions. [2021-06-12 22:22:29,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 22:22:29,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:29,655 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:29,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-12 22:22:29,855 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:29,856 INFO L82 PathProgramCache]: Analyzing trace with hash -534925852, now seen corresponding path program 204 times [2021-06-12 22:22:29,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:29,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715410663] [2021-06-12 22:22:29,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:30,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:30,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715410663] [2021-06-12 22:22:30,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715410663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:30,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915480444] [2021-06-12 22:22:30,027 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:30,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:22:30,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:30,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:22:30,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:30,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915480444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:30,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:30,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-06-12 22:22:30,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340697381] [2021-06-12 22:22:30,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:22:30,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:30,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:22:30,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:22:30,278 INFO L87 Difference]: Start difference. First operand 227686 states and 658844 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:22:32,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:32,175 INFO L93 Difference]: Finished difference Result 307114 states and 885933 transitions. [2021-06-12 22:22:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:22:32,176 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 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 46 [2021-06-12 22:22:32,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:32,886 INFO L225 Difference]: With dead ends: 307114 [2021-06-12 22:22:32,886 INFO L226 Difference]: Without dead ends: 307076 [2021-06-12 22:22:32,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:22:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307076 states. [2021-06-12 22:22:38,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307076 to 227708. [2021-06-12 22:22:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227708 states, 227707 states have (on average 2.8936703746481225) internal successors, (658909), 227707 states have internal predecessors, (658909), 0 states have call successors, (0), 0 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 22:22:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227708 states to 227708 states and 658909 transitions. [2021-06-12 22:22:39,471 INFO L78 Accepts]: Start accepts. Automaton has 227708 states and 658909 transitions. Word has length 46 [2021-06-12 22:22:39,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:39,471 INFO L482 AbstractCegarLoop]: Abstraction has 227708 states and 658909 transitions. [2021-06-12 22:22:39,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 22:22:39,471 INFO L276 IsEmpty]: Start isEmpty. Operand 227708 states and 658909 transitions. [2021-06-12 22:22:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 22:22:40,613 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:40,613 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:40,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-06-12 22:22:40,829 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:40,829 INFO L82 PathProgramCache]: Analyzing trace with hash 250764184, now seen corresponding path program 205 times [2021-06-12 22:22:40,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:40,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029677957] [2021-06-12 22:22:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:41,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:41,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029677957] [2021-06-12 22:22:41,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029677957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:41,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419184347] [2021-06-12 22:22:41,008 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:22:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:41,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419184347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:41,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:41,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-12 22:22:41,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151652987] [2021-06-12 22:22:41,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:22:41,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:41,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:22:41,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:22:41,316 INFO L87 Difference]: Start difference. First operand 227708 states and 658909 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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 22:22:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:43,203 INFO L93 Difference]: Finished difference Result 276784 states and 800858 transitions. [2021-06-12 22:22:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:22:43,204 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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) Word has length 46 [2021-06-12 22:22:43,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:43,767 INFO L225 Difference]: With dead ends: 276784 [2021-06-12 22:22:43,767 INFO L226 Difference]: Without dead ends: 276678 [2021-06-12 22:22:43,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 495.1ms TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:22:44,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276678 states. [2021-06-12 22:22:48,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276678 to 258936. [2021-06-12 22:22:48,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258936 states, 258935 states have (on average 2.9008554270376736) internal successors, (751133), 258935 states have internal predecessors, (751133), 0 states have call successors, (0), 0 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 22:22:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258936 states to 258936 states and 751133 transitions. [2021-06-12 22:22:49,953 INFO L78 Accepts]: Start accepts. Automaton has 258936 states and 751133 transitions. Word has length 46 [2021-06-12 22:22:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:49,953 INFO L482 AbstractCegarLoop]: Abstraction has 258936 states and 751133 transitions. [2021-06-12 22:22:49,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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 22:22:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 258936 states and 751133 transitions. [2021-06-12 22:22:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 22:22:50,871 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:50,871 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:51,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-12 22:22:51,072 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1527268248, now seen corresponding path program 206 times [2021-06-12 22:22:51,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:51,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190303258] [2021-06-12 22:22:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:51,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:51,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190303258] [2021-06-12 22:22:51,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190303258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:51,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037917688] [2021-06-12 22:22:51,207 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:51,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:51,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:51,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:22:51,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:51,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037917688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:51,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:51,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-12 22:22:51,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131962511] [2021-06-12 22:22:51,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:22:51,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:51,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:22:51,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:22:51,455 INFO L87 Difference]: Start difference. First operand 258936 states and 751133 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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 22:22:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:53,285 INFO L93 Difference]: Finished difference Result 279301 states and 807945 transitions. [2021-06-12 22:22:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:22:53,286 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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) Word has length 46 [2021-06-12 22:22:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:53,861 INFO L225 Difference]: With dead ends: 279301 [2021-06-12 22:22:53,861 INFO L226 Difference]: Without dead ends: 279177 [2021-06-12 22:22:53,862 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:22:54,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279177 states. [2021-06-12 22:22:59,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279177 to 255508. [2021-06-12 22:22:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255508 states, 255507 states have (on average 2.898515500553801) internal successors, (740591), 255507 states have internal predecessors, (740591), 0 states have call successors, (0), 0 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 22:23:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255508 states to 255508 states and 740591 transitions. [2021-06-12 22:23:01,172 INFO L78 Accepts]: Start accepts. Automaton has 255508 states and 740591 transitions. Word has length 46 [2021-06-12 22:23:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:01,172 INFO L482 AbstractCegarLoop]: Abstraction has 255508 states and 740591 transitions. [2021-06-12 22:23:01,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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 22:23:01,172 INFO L276 IsEmpty]: Start isEmpty. Operand 255508 states and 740591 transitions. [2021-06-12 22:23:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 22:23:02,124 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:02,124 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:02,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:02,325 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:02,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1217093792, now seen corresponding path program 207 times [2021-06-12 22:23:02,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:02,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753060174] [2021-06-12 22:23:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:02,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:02,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753060174] [2021-06-12 22:23:02,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753060174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:02,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518563102] [2021-06-12 22:23:02,476 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:02,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:23:02,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:02,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:23:02,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:02,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518563102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:02,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:02,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-06-12 22:23:02,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133385484] [2021-06-12 22:23:02,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:23:02,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:02,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:23:02,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:23:02,773 INFO L87 Difference]: Start difference. First operand 255508 states and 740591 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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 22:23:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:04,704 INFO L93 Difference]: Finished difference Result 274555 states and 793544 transitions. [2021-06-12 22:23:04,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:23:04,704 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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) Word has length 46 [2021-06-12 22:23:04,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:05,265 INFO L225 Difference]: With dead ends: 274555 [2021-06-12 22:23:05,265 INFO L226 Difference]: Without dead ends: 274424 [2021-06-12 22:23:05,265 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 478.7ms TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:23:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274424 states. [2021-06-12 22:23:09,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274424 to 253574. [2021-06-12 22:23:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253574 states, 253573 states have (on average 2.8976665496720866) internal successors, (734770), 253573 states have internal predecessors, (734770), 0 states have call successors, (0), 0 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 22:23:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253574 states to 253574 states and 734770 transitions. [2021-06-12 22:23:11,279 INFO L78 Accepts]: Start accepts. Automaton has 253574 states and 734770 transitions. Word has length 46 [2021-06-12 22:23:11,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:11,279 INFO L482 AbstractCegarLoop]: Abstraction has 253574 states and 734770 transitions. [2021-06-12 22:23:11,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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 22:23:11,279 INFO L276 IsEmpty]: Start isEmpty. Operand 253574 states and 734770 transitions. [2021-06-12 22:23:12,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 22:23:12,139 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:12,139 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:12,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-12 22:23:12,340 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:12,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:12,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1861204456, now seen corresponding path program 208 times [2021-06-12 22:23:12,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:12,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844195896] [2021-06-12 22:23:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:12,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:12,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844195896] [2021-06-12 22:23:12,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844195896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:12,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451901260] [2021-06-12 22:23:12,478 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:12,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:23:12,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:12,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:23:12,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:12,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451901260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:12,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:12,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-12 22:23:12,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491518319] [2021-06-12 22:23:12,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:23:12,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:12,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:23:12,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:23:12,720 INFO L87 Difference]: Start difference. First operand 253574 states and 734770 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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 22:23:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:14,390 INFO L93 Difference]: Finished difference Result 271446 states and 784470 transitions. [2021-06-12 22:23:14,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:23:14,391 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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) Word has length 46 [2021-06-12 22:23:14,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:15,553 INFO L225 Difference]: With dead ends: 271446 [2021-06-12 22:23:15,554 INFO L226 Difference]: Without dead ends: 271292 [2021-06-12 22:23:15,554 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:23:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271292 states. [2021-06-12 22:23:20,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271292 to 252854. [2021-06-12 22:23:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252854 states, 252853 states have (on average 2.897572898087031) internal successors, (732660), 252853 states have internal predecessors, (732660), 0 states have call successors, (0), 0 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 22:23:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252854 states to 252854 states and 732660 transitions. [2021-06-12 22:23:22,409 INFO L78 Accepts]: Start accepts. Automaton has 252854 states and 732660 transitions. Word has length 46 [2021-06-12 22:23:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:22,409 INFO L482 AbstractCegarLoop]: Abstraction has 252854 states and 732660 transitions. [2021-06-12 22:23:22,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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 22:23:22,409 INFO L276 IsEmpty]: Start isEmpty. Operand 252854 states and 732660 transitions. [2021-06-12 22:23:22,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 22:23:22,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:22,833 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:23,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:23,033 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:23,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:23,034 INFO L82 PathProgramCache]: Analyzing trace with hash -648117152, now seen corresponding path program 209 times [2021-06-12 22:23:23,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:23,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287739401] [2021-06-12 22:23:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:23,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:23,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287739401] [2021-06-12 22:23:23,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287739401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:23,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423456579] [2021-06-12 22:23:23,185 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:23,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:23:23,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:23,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:23:23,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:23,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423456579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:23,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:23,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-06-12 22:23:23,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281163175] [2021-06-12 22:23:23,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:23:23,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:23,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:23:23,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:23:23,448 INFO L87 Difference]: Start difference. First operand 252854 states and 732660 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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 22:23:25,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:25,184 INFO L93 Difference]: Finished difference Result 270419 states and 781520 transitions. [2021-06-12 22:23:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:23:25,185 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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) Word has length 46 [2021-06-12 22:23:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:26,065 INFO L225 Difference]: With dead ends: 270419 [2021-06-12 22:23:26,065 INFO L226 Difference]: Without dead ends: 270343 [2021-06-12 22:23:26,065 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 451.6ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:23:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270343 states. Received shutdown request... [2021-06-12 22:23:30,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270343 to 252092. [2021-06-12 22:23:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252092 states, 252091 states have (on average 2.8975131995985577) internal successors, (730437), 252091 states have internal predecessors, (730437), 0 states have call successors, (0), 0 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 22:23:31,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:31,038 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 22:23:31,055 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 22:23:31,057 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 22:23:31,057 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 10:23:31 BasicIcfg [2021-06-12 22:23:31,057 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 22:23:31,058 INFO L168 Benchmark]: Toolchain (without parser) took 654421.47 ms. Allocated memory was 192.9 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 172.2 MB in the beginning and 4.9 GB in the end (delta: -4.7 GB). Peak memory consumption was 3.4 GB. Max. memory is 8.0 GB. [2021-06-12 22:23:31,058 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 192.9 MB. Free memory is still 173.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 22:23:31,058 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.74 ms. Allocated memory is still 192.9 MB. Free memory was 172.2 MB in the beginning and 170.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 22:23:31,058 INFO L168 Benchmark]: Boogie Preprocessor took 12.45 ms. Allocated memory is still 192.9 MB. Free memory was 170.8 MB in the beginning and 169.8 MB in the end (delta: 988.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 22:23:31,058 INFO L168 Benchmark]: RCFGBuilder took 235.43 ms. Allocated memory is still 192.9 MB. Free memory was 169.7 MB in the beginning and 157.0 MB in the end (delta: 12.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-06-12 22:23:31,058 INFO L168 Benchmark]: TraceAbstraction took 654147.32 ms. Allocated memory was 192.9 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 156.5 MB in the beginning and 4.9 GB in the end (delta: -4.8 GB). Peak memory consumption was 3.4 GB. Max. memory is 8.0 GB. [2021-06-12 22:23:31,058 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 192.9 MB. Free memory is still 173.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.74 ms. Allocated memory is still 192.9 MB. Free memory was 172.2 MB in the beginning and 170.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.45 ms. Allocated memory is still 192.9 MB. Free memory was 170.8 MB in the beginning and 169.8 MB in the end (delta: 988.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 235.43 ms. Allocated memory is still 192.9 MB. Free memory was 169.7 MB in the beginning and 157.0 MB in the end (delta: 12.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 654147.32 ms. Allocated memory was 192.9 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 156.5 MB in the beginning and 4.9 GB in the end (delta: -4.8 GB). Peak memory consumption was 3.4 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 55 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 654056.3ms, OverallIterations: 227, TraceHistogramMax: 4, EmptinessCheckTime: 31102.1ms, AutomataDifference: 194916.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 86.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20255 SDtfs, 42755 SDslu, 175887 SDs, 0 SdLazy, 80082 SolverSat, 4544 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 36792.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15194 GetRequests, 8699 SyntacticMatches, 151 SemanticMatches, 6344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60323 ImplicationChecksByTransitivity, 70059.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=258936occurred in iteration=223, InterpolantAutomatonStates: 5925, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 320940.7ms AutomataMinimizationTime, 227 MinimizatonAttempts, 2454024 StatesRemovedByMinimization, 226 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1386.3ms SsaConstructionTime, 3164.3ms SatisfiabilityAnalysisTime, 52544.3ms InterpolantComputationTime, 16400 NumberOfCodeBlocks, 16397 NumberOfCodeBlocksAsserted, 829 NumberOfCheckSat, 15960 ConstructedInterpolants, 0 QuantifiedInterpolants, 113826 SizeOfPredicates, 872 NumberOfNonLiveVariables, 17077 ConjunctsInSsa, 3518 ConjunctsInUnsatCore, 440 InterpolantComputations, 14 PerfectInterpolantSequences, 2163/8798 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown